UNITED RENTALS INC
S-1/A, 1997-12-15
EQUIPMENT RENTAL & LEASING, NEC
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<PAGE>
 
   
AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON DECEMBER 12, 1997     
 
                                                     REGISTRATION NO. 333-39117
 
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
                      SECURITIES AND EXCHANGE COMMISSION
                            WASHINGTON, D.C. 20549
 
                               ----------------
                                
                             AMENDMENT NO. 3     
                                      TO
                                   FORM S-1
                            REGISTRATION STATEMENT
                                     UNDER
                          THE SECURITIES ACT OF 1933
 
                               ----------------
                             UNITED RENTALS, INC.
            (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)
 
        DELAWARE                     7353                    06-1493538
     (STATE OR OTHER     (PRIMARY STANDARD INDUSTRIAL     (I.R.S. EMPLOYER
     JURISDICTION OF      CLASSIFICATION CODE NUMBER)  IDENTIFICATION NUMBER)
    INCORPORATION OR
      ORGANIZATION)
 
                          FOUR GREENWICH OFFICE PARK
                         GREENWICH, CONNECTICUT 06830
                                (203) 622-3131
  (ADDRESS, INCLUDING ZIP CODE, AND TELEPHONE NUMBER, INCLUDING AREA CODE, OF
                   REGISTRANT'S PRINCIPAL EXECUTIVE OFFICES)
 
                               BRADLEY S. JACOBS
                             UNITED RENTALS, INC.
                          FOUR GREENWICH OFFICE PARK
                         GREENWICH, CONNECTICUT 06830
                                (203) 622-3131
(NAME, ADDRESS, INCLUDING ZIP CODE, AND TELEPHONE NUMBER, INCLUDING AREA CODE,
                             OF AGENT FOR SERVICE)
 
                               ----------------
                       Copies of all communications to:
 
  JOSEPH EHRENREICH, ESQ.   STEPHEN M. BESEN, ESQ.    PHYLLIS G. KORFF, ESQ.
   EHRENREICH EILENBERG   WEIL, GOTSHAL & MANGES LLP   SKADDEN, ARPS, SLATE,
    KRAUSE & ZIVIAN LLP        767 FIFTH AVENUE         MEAGHER & FLOM LLP
    11 EAST 44TH STREET    NEW YORK, NEW YORK 10153      919 THIRD AVENUE
 NEW YORK, NEW YORK 10017       (212) 310-8000       NEW YORK, NEW YORK 10022
      (212) 986-9700                                      (212) 735-3000
 
  APPROXIMATE DATE OF COMMENCEMENT OF PROPOSED SALE TO THE PUBLIC: As soon as
practicable after the effective date of this Registration Statement.
 
  If any of the securities being registered on this Form are to be offered on
a delayed or continuous basis pursuant to Rule 415 under the Securities Act of
1933, please check the following box. [_]
 
  If this Form is filed to register additional securities for an offering
pursuant to Rule 462(b) under the Securities Act, please check the following
box and list the Securities Act registration statement number of the earlier
effective registration statement for the same offering. [_]
 
  If this Form is a post-effective amendment filed pursuant to Rule 462(c)
under the Securities Act, check the following box and list the Securities Act
registration statement number of the earlier effective registration statement
for the same offering. [_]
 
  If delivery of the prospectus is expected to be made pursuant to Rule 434,
please check the following box. [_]
 
                               ----------------
  THE REGISTRANT HEREBY AMENDS THIS REGISTRATION STATEMENT ON SUCH DATE OR
DATES AS MAY BE NECESSARY TO DELAY ITS EFFECTIVE DATE UNTIL THE REGISTRANT
SHALL FILE A FURTHER AMENDMENT WHICH SPECIFICALLY STATES THAT THIS
REGISTRATION STATEMENT SHALL BECOME EFFECTIVE IN ACCORDANCE WITH SECTION 8(A)
OF THE SECURITIES ACT OF 1933 OR UNTIL THE REGISTRATION STATEMENT SHALL BECOME
EFFECTIVE ON SUCH DATE AS THE COMMISSION, ACTING PURSUANT TO SAID SECTION
8(A), MAY DETERMINE.
 
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
<PAGE>
 
                                    PART II
 
                    INFORMATION NOT REQUIRED IN PROSPECTUS
 
ITEM 13. OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION.
 
<TABLE>
      <S>                                                            <C>
      SEC Registration Fee.......................................... $   34,152
      Listing Fee*.................................................. $  172,000
      NASD Filing Fee............................................... $   11,770
      Accounting Fees and Expenses*................................. $  400,000
      Printing and Engraving Expenses*.............................. $  200,000
      Legal Fees and Expenses (other than blue sky)*................ $  400,000
      Blue Sky Fees and Expenses*................................... $    5,000
      Transfer Agent and Registrar Fees*............................ $    5,000
      Miscellaneous Expenses*....................................... $  262,000
                                                                     ----------
      Total*........................................................ $1,489,922
                                                                     ==========
</TABLE>
- --------
* Estimated.
 
ITEM 14. INDEMNIFICATION OF DIRECTORS AND OFFICERS.
 
  The Certificate of Incorporation (the "Certificate") of the Company provides
that a director will not be personally liable to the Company or its
stockholders for monetary damages for breach of fiduciary duty as a director,
except for liability (i) for any breach of the director's duty of loyalty to
the corporation or its stockholders, (ii) for acts or omissions not in good
faith or which involve intentional misconduct or a knowing violation of law,
(iii) under Section 174 of the Delaware General Corporation Law (the "Delaware
Law"), which concerns unlawful payments of dividends, stock purchases or
redemptions, or (iv) for any transaction from which the director derived an
improper personal benefit. If the Delaware Law is subsequently amended to
permit further limitation of the personal liability of directors, the
liability of a director of the Company will be eliminated or limited to the
fullest extent permitted by the Delaware Law as amended.
 
  The Registrant, as a Delaware corporation, is empowered by Section 145 of
the Delaware Law, subject to the procedures and limitation stated therein, to
indemnify any person against expenses (including attorneys' fees), judgments,
fines and amounts paid in settlement actually and reasonably incurred by him
in connection with any threatened, pending or completed action, suit or
proceeding in which such person is made a party by reason of his being or
having been a director, officer, employee or agent of the Registrant. The
statute provides that indemnification pursuant to its provisions is not
exclusive of other rights of indemnification to which a person may be entitled
under any by-law, agreement, vote of stockholders or disinterested directors,
or otherwise. The Company has entered into indemnification agreements with
each of its directors and officers. In general, these agreements require the
Company to indemnify each of such persons against expenses, judgments, fines,
settlements and other liabilities incurred in connection with any proceeding
(including a derivative action) to which such person may be made a party by
reason of the fact that such person is or was a director, officer or employee
of the Company or guaranteed any obligations of the Company, provided that the
right of an indemnitee to receive indemnification is subject to the following
limitations: (i) an indemnitee is not entitled to indemnification unless he
acted in good faith and in a manner that he reasonably believed to be in or
not opposed to the best interests of the Company, and, with respect to any
criminal action or proceeding, had no reasonable cause to believe such conduct
was unlawful and (ii) in the case of a derivative action, an indemnitee is not
entitled to indemnification in the event that he is judged in a final non-
appealable decision of a court of competent jurisdiction to be liable to the
Company due to willful misconduct in the performance of his duties to the
Company (unless and only to the extent that the court determines that the
indemnitee is fairly and reasonably entitled to indemnification).
 
  Pursuant to Section 145 of the Delaware Law, the Registrant has purchased
insurance on behalf of its present and former directors and officers against
any liability asserted against or incurred by them in such capacity or arising
out of their status as such.
 
                                     II-1
<PAGE>
 
  The Registrant has entered into indemnification agreements with certain
members of its management in the form filed as an exhibit to this registration
statement.
 
ITEM 15. RECENT SALES OF UNREGISTERED SECURITIES.
 
  Set forth below is a listing of all sales by the Company of unregistered
securities since the Company was incorporated on August 14, 1997. All such
sales were exempt from registration under the Securities Act of 1933, as
amended (the "Act"), pursuant to Section 4(2) of the Act (and, in the case of
the private placement described in paragraph 3 below, Regulation D
thereunder), as they were transactions not involving a public offering. The
Company believes that each of the issuances made pursuant to Section 4(2) was
made to a sophisticated investor, who had the financial resources to bear the
risk of the investment and who had the means and opportunity to obtain
information concerning the Company. The consideration paid to the Company in
respect of each issuance was cash, unless otherwise indicated. All sales
described below were made by the Company without the assistance of any
underwriters.
 
    1. In September, October, November and December 1997, the Company issued
  an aggregate of 12,910,714 shares of Common Stock and 6,342,858 warrants to
  certain officers of the Company (including, in certain cases, one or more
  entities controlled by the officer) for an aggregate amount of $46.01
  million (not including 240,000 shares that were issued in the private
  placement described in paragraph 3 below to a person who subsequently
  became a director). See "Management--Capital Contributions by Officers and
  Directors" in the prospectus which is a part of this Registration
  Statement.
 
    2. In October 1997, the Company sold an aggregate of 112,857 shares of
  Common Stock to four employees of the company and one consultant at a price
  of $3.50 per share.
 
    3. In September 1997, the Company in a private placement sold an
  aggregate of 3,028,873 shares of Common Stock, at a price of $3.50 per
  share, to 51 accredited investors. Such sale was made in accordance with
  Regulation D promulgated under the Act.
 
    4. In October 1997, the Company issued 318,712 shares of Common Stock as
  part of the consideration for the acquisition by the Company of one of the
  Initial Acquired Companies. The number of such shares is subject to
  adjustment as described under "Management's Discussion and Analysis of
  Financial Condition and Results of Operations--Consideration for Initial
  Acquired Companies."
 
    5. In October 1997, the Company issued a convertible note in the
  principal amount of $300,000 as part of the consideration for the
  acquisition of one of the Initial Acquired Companies.
 
    6. In October and November 1997, options with respect to 797,500 shares
  of Common Stock were granted to employees of the Company. Such options have
  exercise prices ranging from $10.00 per share to $30.00 per share and a
  weighted average exercise price of $12.49 per share.
 
    7. In November 1997, the Company issued 5,000 shares and a warrant to
  purchase 1,200 shares (at a $10.00 per share exercise price) as
  compensation for services.
 
ITEM 16. EXHIBITS.
 
<TABLE>   
<CAPTION>
 EXHIBIT
 NUMBER                         DESCRIPTION OF EXHIBITS
 -------                        -----------------------
 <C>     <S>
 1(a)*   Form of United States Purchase Agreement
 1(b)*   Form of International Purchase Agreement
 3(a)**  Amended and Restated Certificate of Incorporation of the Company, in
         effect as of the date hereof
 3(b)**  By-laws of the Company, in effect as of the date hereof
  4**    Form of Common Stock Certificate
  5**    Opinion of Ehrenreich Eilenberg Krause & Zivian LLP
</TABLE>    
 
                                     II-2
<PAGE>
 
<TABLE>   
<CAPTION>
 EXHIBIT
 NUMBER                          DESCRIPTION OF EXHIBITS
 -------                         -----------------------
 <C>     <S>
 10(a)** $55 Million Revolving Credit Facility, dated as of October 8, 1997,
         between the Company, various financial institutions, and Bank of
         America National Trust and Savings Association, as agent, together
         with the First Amendment thereto dated October 17, 1997 and the Second
         Amendment thereto dated October 24, 1997
 10(b)** 1997 Stock Option Plan
 10(c)** Form of Warrant Agreement(1)
 10(d)** Form of Private Placement Purchase Agreement entered into by certain
         officers of the Company in connection with purchasing shares and
         warrants from the Company(2)
 10(e)** Form of Subscription Agreement for September 1997 Private Placement(3)
 10(f)** Form of Indemnification Agreement for Officers and Directors of the
         Company
 10(g)** Employment Agreement between the Company and Bradley S. Jacobs, dated
         as of September 19, 1997
 10(h)** Employment Agreement between the Company and John N. Milne, dated as
         of September 19, 1997
 10(i)** Employment Agreement between the Company and Michael J. Nolan, dated
         as of October 14, 1997
 10(j)** Employment Agreement between the Company and Robert P. Miner, dated as
         of October 10, 1997
 10(k)** Stock Purchase Agreement, dated as of October 24, 1997, among the
         Company and the shareholders of Mercer Equipment Company+
 10(l)** Stock Purchase Agreement, dated as of October 24, 1997, among the
         Company and the shareholders of Bronco Hi-Lift Inc.+
 10(m)** Stock Purchase Agreement, dated as of October 24, 1997, among the
         Company and Coran Enterprises, Inc., Monterey Bay Equipment Rentals,
         Inc., James M. Shade, Carol A. Shade, James M. Shade and Carol Anne
         Shade, Trustees under the James M. Shade and Carol A. Shade Trust
         Agreement dated September 14, 1982, Randall Shade and Corey Shade.+
 10(n)** Stock Purchase Agreement, dated as of October 24, 1997, among the
         Company and the shareholders of Rent-It Center, Inc.+
 10(o)** Stock Purchase Agreement, dated as of October 20, 1997, among the
         Company and A&A Tool Rentals & Sales, Inc., Joseph E. Doran, Patrick
         J. Doran, and A&A Tool Rentals & Sales, Inc. Employee Stock Ownership
         Plan.+
 10(p)** Agreement and Plan of Merger, dated as of October 23, 1997, among the
         Company, UR Acquisition Subsidiary, Inc. and J&J Rental Services,
         Inc.+
 10(q)** Convertible Note dated October 24, 1997
 10(r)** Subscription Agreement dated November 14, 1997, between Wayland R.
         Hicks and the Company
 10(s)** Agreement dated November 14, 1997, between the Company and Wayland R.
         Hicks
 11**    Statement re: Computation of per share earnings
 21**    Subsidiaries of the Registrant
 23(a)** Consent of Ehrenreich Eilenberg Krause & Zivian LLP (included in
         opinion filed as Exhibit 5)
 23(b)** Consent of Weil, Gotshal & Manges LLP
 23(c)** Consent of Ernst & Young LLP
 23(d)** Consent of Ernst & Young LLP
 23(e)** Consent of Ernst & Young LLP
 23(f)** Consent of KPMG Peat Marwick
 23(g)** Consent of Webster Duke & Co. PA
</TABLE>    
 
                                      II-3
<PAGE>
 
<TABLE>   
<CAPTION>
 EXHIBIT
 NUMBER                        DESCRIPTION OF EXHIBITS
 -------                       -----------------------
 <C>     <S>
 23(h)** Consent of Grant Thornton LLP
 23(i)** Consent of Wayland R. Hicks
 24**    Power of Attorney (included in Part II of the original Registration
         Statement under the caption "Signatures")
 27**    Financial Data Schedule
</TABLE>    
- --------
   
  * Filed herewith.     
 ** Previously filed.
       
  + Filed without exhibits and schedules (to be provided supplementally upon
request of the Commission).
(1) The Company issued a warrant in this form to the following officers of the
    Company (or in certain cases to an entity controlled by such officer) for
    the number of shares indicated: Bradley S. Jacobs (5,000,000); John N.
    Milne (714,286); Michael J. Nolan (285,715); Robert P. Miner (142,857);
    Sandra E. Welwood (50,000); Joseph J. Kondrup, Jr. (50,000); Kai E. Nyby
    (50,000); and Richard A. Volonino (50,000).
(2) Each officer of the Company who purchased securities prior to the date
    hereof, other than Messrs. Jacobs and Hicks, entered into a Private
    Placement Purchase Agreement in this form (modified, in the case of
    Messrs. Barker and Imig, to reflect the fact that such officers did not
    purchase Warrants) with respect to the shares of Common Stock and Warrants
    purchased by such officer from the Company as described under
    "Management--Capital Contributions by Officers and Directors."
(3) Each purchaser of shares in the Company's September 1997 private placement
    of 3,028,873 shares of Common Stock entered into a Subscription Agreement
    in this form with respect to the shares purchased.
 
ITEM 17. UNDERTAKINGS.
 
  The undersigned Registrant undertakes to provide to the Underwriter at the
closing specified in the underwriting agreement certificates in such
denominations and registered in such names as required by the underwriter to
permit prompt delivery to each purchaser.
 
  Insofar as indemnification for liabilities arising under the Securities Act
of 1933 may be permitted to directors, officers and controlling persons of the
Registrant pursuant to the foregoing provisions, or otherwise, the Registrant
has been advised that in the opinion of the Securities and Exchange Commission
such indemnification is against public policy as expressed in the Act and is,
therefore, unenforceable. In the event that a claim for indemnification
against such liabilities (other than the payment by the Registrant of expenses
incurred or paid by a director, officer or controlling person of the
Registrant in the successful defense of any action, suit or proceeding) is
asserted by such director, officer or controlling person in connection with
the securities being registered, the Registrant will, unless in the opinion of
its counsel the matter has been settled by controlling precedent, submit to a
court of appropriate jurisdiction the question whether such indemnification by
it is against public policy as expressed in the Act and will be governed by
the final adjudication of such issue.
 
  The undersigned Registrant hereby undertakes that:
 
    (1) For purposes of determining any liability under the Securities Act of
  1933, the information omitted from the form of prospectus filed as part of
  a registration statement in reliance upon Rule 430A and contained in the
  form of prospectus filed by the Registrant pursuant to Rule 424(b)(1) or
  (4) or 497(h) under the Securities Act of 1933 shall be deemed to be part
  of this registration statement as of the time it was declared effective.
 
    (2) For the purpose of determining any liability under the Securities Act
  of 1933, each post-effective amendment that contains a form of prospectus
  shall be deemed to be a new registration statement relating to the
  securities offered therein, and the offering of such securities at that
  time shall be deemed to be the initial bona fide offering thereof.
 
                                     II-4
<PAGE>
 
                                   SIGNATURES
   
  PURSUANT TO THE REQUIREMENTS OF THE SECURITIES ACT OF 1933, THE REGISTRANT
HAS DULY CAUSED THIS AMENDMENT NO. 3 TO REGISTRATION STATEMENT TO BE SIGNED ON
ITS BEHALF BY THE UNDERSIGNED, THEREUNTO DULY AUTHORIZED, IN THE CITY OF NEW
YORK, STATE OF NEW YORK, ON DECEMBER 10, 1997.     
 
                                         United Rentals, Inc.
 
                                                   /s/ Michael J. Nolan
                                         By: __________________________________
                                                       MICHAEL J. NOLAN
                                                    CHIEF FINANCIAL OFFICER
 
  PURSUANT TO THE REQUIREMENTS OF THE SECURITIES ACT OF 1933, THIS REGISTRATION
STATEMENT HAS BEEN SIGNED BY THE FOLLOWING PERSONS IN THEIR RESPECTIVE
CAPACITIES AND ON THE RESPECTIVE DATES SET FORTH OPPOSITE THEIR NAMES.
 
             SIGNATURE                       TITLE                 DATE
 
/s/              *                    Chairman, Chief             
- ------------------------------------   Executive Officer       December 10,
         BRADLEY S. JACOBS             and Director             1997     
                                       (Principal
                                       Executive Officer)
 
/s/              *                    Director                    
- ------------------------------------                           December 10,
           JOHN N. MILNE                                        1997     
 
                                      Director                 December  ,
- ------------------------------------                               1997
          RONALD M. DEFEO
 
/s/              *                    Director                    
- ------------------------------------                           December 10,
        RICHARD J. HECKMANN                                     1997     
 
                                      Director                 December  ,
- ------------------------------------                               1997
          GERALD TSAI, JR.
 
/s/       Michael J. Nolan            Chief Financial             
- ------------------------------------   Officer (Principal      December 10,
          MICHAEL J. NOLAN             Financial Officer)       1997     
 
/s/      Sandra E. Welwood            Vice President,             
____________________________________   Corporate               December 10,
         SANDRA E. WELWOOD             Controller               1997     
                                       (Principal
                                       Accounting
                                       Officer)
 
          Michael J. Nolan
*By: _______________________________
 MICHAEL J. NOLAN ATTORNEY-IN-FACT
 
                                      II-5
<PAGE>
 
                                 EXHIBIT INDEX
 
<TABLE>   
<CAPTION>
 EXHIBIT                                                                  PAGE
 NUMBER                     DESCRIPTION OF EXHIBITS                      NUMBER
 -------                    -----------------------                      ------
 <C>     <S>                                                             <C>
  1(a)*  Form of U.S. Purchase Agreement
  1(b)*  Form of International Purchase Agreement
  3(a)** Amended and Restated Certificate of Incorporation of the
         Company, in effect as of the date hereof
  3(b)** By-laws of the Company, in effect as of the date hereof
  4**    Form of Common Stock Certificate
  5**    Opinion of Ehrenreich Eilenberg Krause and Zivian LLP
 10(a)** $55 Million Revolving Credit Facility, dated as of October 8,
         1997, between the Company, various financial institutions,
         and Bank of America National Trust and Savings Association,
         as agent, together with the First Amendment thereto dated
         October 17, 1997 and the Second Amendment thereto dated
         October 24, 1997
 10(b)** 1997 Stock Option Plan
 10(c)** Form of Warrant Agreement(1)
 10(d)** Form of Private Placement Purchase Agreement entered into by
         certain officers of the Company in connection with purchasing
         shares and warrants from the Company(2)
 10(e)** Form of Subscription Agreement for September 1997 Private
         Placement(3)
 10(f)** Form of Indemnification Agreement for Officers and Directors
         of the Company
 10(g)** Employment Agreement between the Company and Bradley S.
         Jacobs, dated as of September 14, 1997
 10(h)** Employment Agreement between the Company and John N. Milne,
         dated as of September 14, 1997
 10(i)** Employment Agreement between the Company and Michael J.
         Nolan, dated as of October 14, 1997
 10(j)** Employment Agreement between the Company and Robert P. Miner,
         dated as of October 10, 1997
 10(k)** Stock Purchase Agreement, dated as of October 24, 1997, among
         the Company and the shareholders of Mercer Equipment Company+
 10(l)** Stock Purchase Agreement, dated as of October 24, 1997, among
         the Company and the shareholders of Bronco Hi-Lift Inc.+
 10(m)** Stock Purchase Agreement, dated as of October 24, 1997, among
         the Company and Coran Enterprises, Inc., Monterey Bay
         Equipment Rentals, Inc., James M. Shade, Carol A. Shade,
         James M. Shade and Carol Anne Shade, Trustees under the James
         M. Shade and Carol A. Shade Trust Agreement dated September
         14, 1982, Randall Shade and Corey Shade.+
 10(n)** Stock Purchase Agreement, dated as of October 24, 1997, among
         the Company and the shareholders of Rent-It Center, Inc.+
 10(o)** Stock Purchase Agreement, dated as of October 20, 1997, among
         the Company and A&A Tool Rentals & Sales, Inc., Joseph E.
         Doran, Patrick J. Doran, and A&A Tool Rentals & Sales, Inc.
         Employee Stock Ownership Plan.+
 10(p)** Agreement and Plan of Merger, dated as of October 23, 1997,
         among the Company, UR Acquisition Subsidiary, Inc. and J&J
         Rental Services, Inc.+
</TABLE>    
 
<PAGE>
 
<TABLE>   
<CAPTION>
 EXHIBIT                                                                  PAGE
 NUMBER                     DESCRIPTION OF EXHIBITS                      NUMBER
 -------                    -----------------------                      ------
 <C>     <S>                                                             <C>
 10(q)** Convertible Note dated October 24, 1997
 10(r)** Subscription Agreement dated November 14, 1997, between
         Wayland R. Hicks and the Company
 10(s)** Agreement dated November 14, 1997, between the Company and
         Wayland R. HIcks
 11**    Statement re: Computation of per share earnings
 21**    Subsidiaries of the Company
 23(a)** Consent of Ehrenreich Eilenberg Krause & Zivian LLP (included
         in opinion filed as Exhibit 5)
 23(b)** Consent of Weil, Gotshal & Manges LLP
 23(c)** Consent of Ernst & Young LLP
 23(d)** Consent of Ernst & Young LLP
 23(e)** Consent of Ernst & Young LLP
 23(f)** Consent of KPMG Peat Marwick
 23(g)** Consent of Webster Duke & Co. PA
 23(h)** Consent of Grant Thornton LLP
 23(i)** Consent of Wayland R. Hicks
 24**    Power of Attorney (included in Part II of the original
         Registration Statement under the caption "Signatures")
 27**    Financial Data Schedule
</TABLE>    
- --------
          
  * Filed herewith     
 ** Previously filed
       
  + Filed without exhibits and schedules (to be provided supplementally upon
request of the Commission).
(1) The Company issued a warrant in this form to the following officers of the
    Company (or in certain cases to an entity controlled by such officer) for
    the number of shares indicated: Bradley S. Jacobs (5,000,000); John N.
    Milne (714,286); Michael J. Nolan (285,715); Robert P. Miner (142,857);
    Sandra E. Welwood (50,000); Joseph J. Kondrup, Jr. (50,000); Kai E. Nyby
    (50,000); and Richard A. Volonino (50,000).
(2) Each officer of the Company who purchased securities prior to the date
    hereof, other than Messrs. Jacobs and Hicks, entered into a Private
    Placement Purchase Agreement in this form (modified, in the case of
    Messrs. Barker and Imig, to reflect the fact that such officers did not
    purchase Warrants) with respect to the shares of Common Stock and Warrants
    purchased by such officer from the Company as described under
    "Management--Capital Contributions by Officers and Directors."
(3) Each purchaser of shares in the Company's September 1997 private placement
    of 3,028,873 shares of Common Stock entered into a Subscription Agreement
    in this form with respect to the shares purchased.

<PAGE>
 
                                                                    EXHIBIT 1(a)

================================================================================






                             United Rentals, Inc.
                           (A Delaware Corporation)

                       5,600,000 Shares of Common Stock




                            U.S. PURCHASE AGREEMENT
                            -----------------------







Dated:  December  , 1997

================================================================================
<PAGE>
 
                               TABLE OF CONTENTS

                                                                          PAGE

      SECTION 1.  Representations and Warranties.........................  4
            (a)  Representations and Warranties by the Company...........  4
                  (i)      Compliance with Registration Requirements.....  4
                  (ii)     Independent Accountants.......................  5
                  (iii)    Financial Statement...........................  5
                  (iv)     No Material Adverse Change in Business........  5
                  (v)      Good Standing of the Company..................  6
                  (vi)     Good Standing of Subsidiaries.................  6
                  (vii)    Capitalization................................  6
                  (viii)   Authorization of Agreement....................  7
                  (ix)     Authorization and Description of Securities...  7
                  (x)      Absence of Defaults and Conflicts.............  7
                  (xi)     Absence of Labor Dispute......................  8
                  (xii)    Absence of Proceedings........................  8
                  (xiii)   Accuracy of Exhibits..........................  8
                  (xiv)    Possession of Intellectual Property...........  8
                  (xv)     Absence of Further Requirements...............  9
                  (xvi)    Possession of Licenses and Permits............  9
                  (xvii)   Title to Property.............................  9
                  (xviii)  Compliance with Cuba Act...................... 10
                  (xix)       Investment Company Act..................... 10
                  (xx)  Environmental Laws............................... 10
                  (xxi)       Registration Rights........................ 11

            (b)   Officer's Certificates ................................ 11

      SECTION 2.  Sale and Delivery to U.S. Underwriters; Closing........ 11
            (a)   Initial Securities..................................... 11
            (b)   Option Securities...................................... 11
            (c)   Payment................................................ 12
            (d)   Denominations; Registration............................ 12

      SECTION 3.  Covenants of the Company............................... 13
                  ------------------------
            (a)   Compliance with Securities Regulations and Commission
                  Requests............................................... 13
            (b)   Filing of Amendments................................... 13
            (c)   Delivery of Registration Statements.................... 13

                                       i
<PAGE>
 
            (d)   Delivery of Prospectuses................................ 14
            (e)   Continued Compliance with Securities Laws............... 14
            (f)   Blue Sky Qualifications................................. 14
            (g)   Rule 158................................................ 15
            (h)   Use of Proceeds......................................... 15
            (i)   Listing................................................. 15
            (j)   Restriction on Sale of Securities....................... 15
            (k)   Reporting Requirements.................................. 15
            (l)   Compliance with NASD Rules.............................. 16
            (m)   Compliance with Rule 463................................ 16

      SECTION 4.  Payment of Expenses..................................... 16
                  -------------------
            (a)   Expenses................................................ 16
            (b)   Termination of Agreement................................ 27

      SECTION 5.  Conditions of U.S. Underwriters' Obligations............ 17
                  --------------------------------------------
            (a)   Effectiveness of Registration Statement................. 17
            (b)   Opinion of Counsel for Company.......................... 17
            (c)   Opinion of Counsel for U.S. Underwriters................ 18
            (d)   Officers' Certificate................................... 18
            (e)   Accountant's Comfort Letter............................. 18
            (f)   Bring-down Comfort Letter............................... 18
            (g)   Approval of Listing..................................... 
            (h)   No Objection............................................ 19
            (i)   Lock-up Agreements...................................... 19
            (j)   Purchase of Initial International Securities............ 19
            (k)   Conditions to Purchase of U.S. Option Securities........ 19
            (l)   Additional Documents.................................... 20
            (m)   Termination of Agreement................................ 20

      SECTION 6.  Indemnification......................................... 20
                  ---------------
            (a)   Indemnification of U.S. Underwriters.................... 20
            (b)   Indemnification of Company, Directors and Officers...... 22
            (c)   Actions against Parties; Notification................... 22
            (d)   Settlement without Consent if Failure to Reimburse ..... 23
            (e)   Indemnification for Reserved Securities................. 23

      SECTION 7.  Contribution............................................ 23
                  ------------

      SECTION 8.  Representations, Warranties and Agreements to Survive 
                  -----------------------------------------------------
                  Delivery................................................ 24
                  --------
                                      ii
<PAGE>
 
      SECTION 9.  Termination of Agreement................................ 25
                  ------------------------
            (a)   Termination; General.................................... 25
            (b)   Liabilities............................................. 25

      SECTION 10.  Default by One or More of the U.S. Underwriters........ 25
                   -----------------------------------------------

      SECTION 11.  Notices................................................ 26
                   -------

      SECTION 12.  Parties................................................ 26
                   -------

      SECTION 13.  Governing Law and Time................................. 26
                   ----------------------

      SECTION 14.  Effect of Headings..................................... 26
                   ------------------

SCHEDULES
      Schedule A........................................................Sch A-1
      Schedule B........................................................Sch B-1
      Schedule C........................................................Sch C-1

EXHIBITS
      Exhibit A-1 - Form of Opinion of Company's Counsel....................A-1
      Exhibit A-2 - Form of Opinion of Company's Counsel....................A-2
      Exhibit B - Form of Lock-up Letter....................................B-1

ANNEX
      Annex A - Form of Accountants' Comfort Letter Pursuant to Section 
      5(e)............................................................Annex A-1

                                      iii
<PAGE>
 
                             United Rentals, Inc.

                           (a Delaware corporation)

                       5,600,000 Shares of Common Stock

                          (Par Value $.01 Per Share)

                            U.S. PURCHASE AGREEMENT
                            -----------------------

                                                              December  , 1997

MERRILL LYNCH & CO.
Merrill Lynch, Pierce, Fenner & Smith
              Incorporated

Donaldson, Lufkin & Jenrette Securities Corporation
Deutsche Morgan Grenfell Inc.
      as U.S. Representatives of the several U.S. Underwriters
c/o  Merrill Lynch & Co.
      Merrill Lynch, Pierce, Fenner & Smith
                Incorporated

North Tower
World Financial Center
New York, New York  10281-1209

Ladies and Gentlemen:

      United Rentals, Inc., a Delaware corporation (the "Company"), confirms its
agreement with Merrill Lynch & Co., Merrill Lynch, Pierce, Fenner & Smith
Incorporated ("Merrill Lynch") and each of the other U.S. Underwriters named in
Schedule A hereto (collectively, the "U.S. Underwriters", which term shall also
include any underwriter substituted as hereinafter provided in Section 10
hereof), for whom Merrill Lynch, Donaldson, Lufkin & Jenrette Securities
Corporation and Deutsche Morgan Grenfell Inc. are acting as representatives (in
such capacity, the "U.S. Representatives"), with respect to the issue and sale
by the Company and the purchase by the U.S. Underwriters, acting severally and
not jointly, of the respective numbers of shares of Common Stock, par value $.01
per share, of the Company ("Common Stock") set forth in said Schedule A, and
with respect to the grant by the Company to the U.S. Underwriters, acting
severally and not jointly, of the option described in Section 2(b) hereof to
purchase all or any part of 840,000 additional shares of Common Stock to cover
over-allotments, if any. The aforesaid 5,600,000 shares of Common Stock (the
"Initial U.S. Securities") to be purchased by the U.S.

                                       1
<PAGE>
 
Underwriters and all or any part of the 840,000 shares of Common Stock subject
to the option described in Section 2(b) hereof (the "U.S. Option Securities")
are hereinafter called, collectively, the "U.S. Securities".

      It is understood that the Company is concurrently entering into an
agreement dated the date hereof (the "International Purchase Agreement")
providing for the offering by the Company of an aggregate of 1,400,000 shares of
Common Stock (the "Initial International Securities") through arrangements with
certain underwriters outside the United States and Canada (the "International
Managers") for which Merrill Lynch International, Donaldson, Lufkin & Jenrette
International and Deutsche Morgan Grenfell Inc. are acting as lead managers (the
"Lead Managers") and the grant by the Company to the International Managers,
acting severally and not jointly, of an option to purchase all or any part of
the 210,000 additional shares of Common Stock solely to cover over-allotments,
if any (the "International Option Securities" and, together with the U.S. Option
Securities, the "Option Securities"). The Initial International Securities and
the International Option Securities are hereinafter called the "International
Securities". It is understood that the Company is not obligated to sell and the
U.S. Underwriters are not obligated to purchase, any Initial U.S. Securities
unless all of the Initial International Securities are contemporaneously
purchased by the International Managers.

      The U.S. Underwriters and the International Managers are hereinafter
collectively called the "Underwriters". The Initial U.S. Securities and the
Initial International Securities are hereinafter collectively called the
"Initial Securities". The U.S. Securities and the International Securities are
hereinafter collectively called the "Securities".

      The Underwriters will concurrently enter into an Intersyndicate Agreement
of even date herewith (the "Intersyndicate Agreement") providing for the
coordination of certain transactions among the Underwriters under the direction
of Merrill Lynch & Co., Merrill Lynch, Pierce, Fenner & Smith Incorporated (in
such capacity, the "Global Coordinator").

      The Company understands that the U.S. Underwriters propose to make a
public offering of the U.S. Securities as soon as the U.S. Representatives deem
advisable after this Agreement has been executed and delivered.

      The Company and the U.S. Underwriters agree that up to 700,000 shares of
the Initial U.S. Securities to be purchased by the U.S. Underwriters (the
"Reserved Securities") shall be reserved for sale by the Underwriters to certain
employees, directors, and business associates of, and certain other persons
designated by, the Company, as part of the distribution of the Securities by the
Underwriters, subject to the terms of this Agreement, the applicable rules,
regulations and interpretations of the National Association of Securities
Dealers, Inc. (the "NASD") and all other applicable laws, rules and regulations.
To the extent that such Reserved Securities are not orally confirmed for
purchase by such employees, directors, and business associates of, and certain
other persons designated by, the Company by the end of the first business day
after the date of this

                                       2
<PAGE>
 
Agreement, such Reserved Securities will be offered to the public as part of the
public offering contemplated hereby.

      The Company has filed with the Securities and Exchange Commission (the
"Commission") a registration statement on Form S-1 (No. 333-39117) covering the
registration of the Securities under the Securities Act of 1933, as amended (the
"1933 Act"), including the related preliminary prospectus or prospectuses.
Promptly after execution and delivery of this Agreement, the Company will either
(i) prepare and file a prospectus in accordance with the provisions of Rule 430A
("Rule 430A") of the rules and regulations of the Commission under the 1933 Act
(the "1933 Act Regulations") and paragraph (b) of Rule 424 ("Rule 424(b)") of
the 1933 Act Regulations or (ii) if the Company has elected to rely upon Rule
434 ("Rule 434") of the 1933 Act Regulations, prepare and file a term sheet (a
"Term Sheet") in accordance with the provisions of Rule 434 and Rule 424(b). Two
forms of prospectus are to be used in connection with the offering and sale of
the Securities: one relating to the U.S. Securities (the "Form of U.S.
Prospectus") and one relating to the International Securities (the "Form of
International Prospectus"). The Form of International Prospectus is identical to
the Form of U.S. Prospectus, except for the front cover and back cover pages and
the information under the caption "Underwriting." The information included in
any such prospectus or in any such Term Sheet, as the case may be, that was
omitted from such registration statement at the time it became effective but
that is deemed to be part of such registration statement at the time it became
effective (a) pursuant to paragraph (b) of Rule 430A is referred to as "Rule
430A Information" or (b) pursuant to paragraph (d) of Rule 434 is referred to as
"Rule 434 Information." Each Form of U.S. Prospectus and Form of International
Prospectus used before such registration statement became effective, and any
prospectus that omitted, as applicable, the Rule 430A Information or the Rule
434 Information, that was used after such effectiveness and prior to the
execution and delivery of this Agreement, is herein called a "preliminary
prospectus." Such registration statement, including the exhibits thereto and
schedules thereto at the time it became effective and including the Rule 430A
Information and the Rule 434 Information, as applicable, is herein called the
"Registration Statement." Any registration statement filed pursuant to Rule
462(b) of the 1933 Act Regulations is herein referred to as the "Rule 462(b)
Registration Statement," and after such filing the term "Registration Statement"
shall include the Rule 462(b) Registration Statement. The final Form of U.S.
Prospectus and the final Form of International Prospectus in the forms first
furnished to the Underwriters for use in connection with the offering of the
Securities are herein called the "U.S. Prospectus" and the "International
Prospectus," respectively, and collectively, the "Prospectuses." If Rule 434 is
relied on, the terms "U.S. Prospectus" and "International Prospectus" shall
refer to the preliminary U.S. Prospectus dated December 3, 1997 and the
preliminary International Prospectus dated December 3, 1997, respectively, each
together with the applicable Term Sheet and all references in this Agreement to
the date of such Prospectuses shall mean the date of the applicable Term Sheet.
For purposes of this Agreement, all references to the Registration Statement,
any preliminary prospectus, the U.S. Prospectus, the International Prospectus or
any Term Sheet or any amendment or supplement to any of the foregoing shall be
deemed to include the copy filed with the Commission pursuant to its Electronic
Data Gathering, Analysis and Retrieval system ("EDGAR").

                                       3
<PAGE>
 
      SECTION 1.        Representations and Warranties.
                        ------------------------------

      (a) Representations and Warranties by the Company. The Company represents
and warrants to each U.S. Underwriter as of the date hereof (and agrees that
each such representation and warranty will be deemed to be made by the Company
as of the Closing Time referred to in Section 2(c) hereof, and as of each Date
of Delivery (if any) referred to in Section 2(b) hereof) and agrees with each
U.S. Underwriter, as follows:

                  (i) Compliance with Registration Requirements. Each of the
                      -----------------------------------------
      Registration Statement and any Rule 462(b) Registration Statement has
      become effective under the 1933 Act and no stop order suspending the
      effectiveness of the Registration Statement or any Rule 462(b)
      Registration Statement has been issued under the 1933 Act and no
      proceedings for that purpose have been instituted or are pending or, to
      the knowledge of the Company, are contemplated by the Commission, and any
      request on the part of the Commission for additional information has been
      complied with.

                  At the respective times the Registration Statement, any Rule
      462(b) Registration Statement and any post-effective amendments thereto
      became effective and at the Closing Time (and, if any U.S. Option
      Securities are purchased, at the Date of Delivery), the Registration
      Statement, the Rule 462(b) Registration Statement and any amendments and
      supplements thereto complied and will comply in all material respects with
      the requirements of the 1933 Act and the 1933 Act Regulations and did not
      and will not contain an untrue statement of a material fact or omit to
      state a material fact required to be stated therein or necessary to make
      the statements therein not misleading, and the Prospectuses, any
      preliminary prospectuses and any supplement thereto or prospectus wrapper
      prepared in connection therewith, at their respective times of issuance
      and at the Closing Time, complied and will comply in all material respects
      with any applicable laws or regulations of Switzerland in connection with
      the offer and sale of Reserved Securities. Neither of the Prospectuses nor
      any amendments or supplements thereto (including any prospectus wrapper),
      at the time the Prospectuses or any amendments or supplements thereto were
      issued and at the Closing Time (and, if any U.S. Option Securities are
      purchased, at the Date of Delivery), included or will include an untrue
      statement of a material fact or omitted or will omit to state a material
      fact necessary in order to make the statements therein, in the light of
      the circumstances under which they were made, not misleading. If Rule 434
      is used, the Company will comply with the requirements of Rule 434 and the
      Prospectuses shall not be "materially different", as such term is used in
      Rule 434, from the prospectuses included in the Registration Statement at
      the time it became effective. The representations and warranties in this
      subsection shall not apply to statements in or omissions from the
      Registration Statement or the U.S. Prospectus made in reliance upon and in
      conformity with information furnished to the Company in writing by any
      U.S. Underwriter through the U.S. Representatives expressly for use in the
      Registration Statement or the U.S. Prospectus.

                                       4
<PAGE>
 
                  Each preliminary prospectus and the prospectuses filed as part
      of the Registration Statement as originally filed or as part of any
      amendment thereto, or filed pursuant to Rule 424 under the 1933 Act,
      complied when so filed in all material respects with the 1933 Act
      Regulations and each preliminary prospectus and the Prospectuses delivered
      to the Underwriters for use in connection with this offering was identical
      to the electronically transmitted copies thereof filed with the Commission
      pursuant to EDGAR, except to the extent permitted by Regulation S-T.

                  (ii) Independent Accountants. The accountants who certified
                       -----------------------
      the financial statements and supporting schedules of the Company and its
      subsidiaries included in the Registration Statement are independent public
      accountants as required by the 1933 Act and the 1933 Act Regulations.

                  (iii) Financial Statements. Each of the historical financial
                        --------------------
      statements included in the Registration Statement and Prospectus, together
      with related schedules and Notes, present fairly (on a consolidated basis
      where so indicated) the financial condition of the entity or entities to
      which such financial statement purports to relate (the "Reported Entity")
      at the date(s) indicated and the statement of operations (or income or
      earnings as indicated in the applicable financial statement) and cash
      flows and (in the case of a Reported Entity for which a statement of
      stockholders' equity is included) stockholders' equity (and partners'
      capital if so indicated in the applicable financial statement) of the
      Reported Entity for the period(s) specified; said financial statements
      have been prepared in conformity with generally accepted accounting
      principles ("GAAP") applied on a consistent basis throughout the periods
      involved (except as otherwise indicated in such financial statements). Any
      supporting schedules included in the Registration Statement present fairly
      in accordance with GAAP the information required to be stated therein. The
      selected historical financial data and the summary historical financial
      information included in the Prospectuses present fairly the information
      shown therein and, in the case of historical financial data or information
      of the Company, have been compiled on a basis consistent with that of the
      audited financial statements included in the Registration Statement. The
      pro forma financial statements and the related notes thereto included in
      the Registration Statement and the Prospectuses present fairly the
      information shown therein, have been prepared in accordance with the
      Commission's rules and guidelines with respect to pro forma financial
      statements and have been properly compiled on the bases described therein,
      and the assumptions used in the preparation thereof are reasonable and the
      adjustments used therein are appropriate to give effect to the
      transactions and circumstances referred to therein.

                  (iv) No Material Adverse Change in Business. Since the
                       --------------------------------------
      respective dates as of which information is given in the Registration
      Statement and the Prospectuses, except as otherwise stated therein, (A)
      there has been no material adverse change in the condition, financial or
      otherwise, or in the earnings, business affairs or to the best knowledge
      of the Company business prospects of the Company and its subsidiaries
      considered as one

                                       5
<PAGE>
 
      enterprise, whether or not arising in the ordinary course of business (a
      "Material Adverse Effect"), (B) there have been no transactions entered
      into by the Company or any of its subsidiaries, other than those in the
      ordinary course of business, which are material with respect to the
      Company and its subsidiaries considered as one enterprise, and (C) there
      has been no dividend or distribution of any kind declared, paid or made by
      the Company on any class of its capital stock.

                  (v) Good Standing of the Company. The Company has been duly
                      ----------------------------
      organized and is validly existing as a corporation in good standing under
      the laws of the State of Delaware and has corporate power and authority to
      own, lease and operate its properties and to conduct its business as
      described in the Prospectuses and to enter into and perform its
      obligations under this Agreement; and the Company is duly qualified as a
      foreign corporation to transact business and is in good standing in each
      other jurisdiction in which such qualification is required, whether by
      reason of the ownership or leasing of property or the conduct of business,
      except where the failure so to qualify or to be in good standing would not
      result in a Material Adverse Effect.

                  (vi) Good Standing of Subsidiaries. Each subsidiary of the
                       -----------------------------
      Company has been duly organized and is validly existing as a corporation
      in good standing under the laws of the jurisdiction of its incorporation,
      has corporate power and authority to own, lease and operate its properties
      and to conduct its business as described in the Prospectuses and is duly
      qualified as a foreign corporation to transact business and is in good
      standing in each jurisdiction in which such qualification is required,
      whether by reason of the ownership or leasing of property or the conduct
      of business, except where the failure so to qualify or to be in good
      standing would not result in a Material Adverse Effect; except as
      otherwise disclosed in the Registration Statement, all of the issued and
      outstanding capital stock of each such subsidiary has been duly authorized
      and validly issued, is fully paid and non-assessable and is owned by the
      Company, directly or through subsidiaries, free and clear of any security
      interest, mortgage, pledge, lien, encumbrance, claim or equity (except for
      any security interest or pledge contemplated by the Credit Agreement filed
      as Exhibit 10(a) to the Registration Statement); none of the outstanding
      shares of capital stock of any subsidiary was issued in violation of the
      preemptive or similar rights of any securityholder of such subsidiary. The
      only subsidiaries of the Company (other than inactive subsidiaries) are
      the subsidiaries listed on Exhibit 21 to the Registration Statement.

                  (vii) Capitalization. The authorized, issued and outstanding
                        --------------
      capital stock of the Company is as set forth in the Prospectuses under
      "Description of Capital Stock--General" (except for subsequent issuances,
      if any, pursuant to this Agreement, pursuant to reservations, agreements
      or employee benefit plans referred to in the Prospectuses or pursuant to
      the exercise of convertible securities, warrants or options referred to in
      the Prospectuses). The shares of issued and outstanding capital stock of
      the Company have been duly authorized and validly issued and are fully
      paid and non-

                                       6
<PAGE>
 
      assessable; none of the outstanding shares of capital stock of the Company
      was issued in violation of the preemptive or other similar rights of any
      security holder of the Company. All sales of the Company's capital stock
      prior to the date hereof were either (1) made pursuant to a registration
      statement filed by the Company with the Commission under the 1933 Act or
      (2) at all relevant times exempt from the registration requirements of the
      1933 Act and in case (1) and (2) duly registered with or the subject of an
      available exemption from the registration requirements of the applicable
      state securities or blue sky laws.

                  (viii) Authorization of Agreement. This Agreement and the
                         --------------------------
      International Purchase Agreement have been duly authorized, executed and
      delivered by the Company.

                  (ix) Authorization and Description of Securities. The
                       -------------------------------------------
      Securities to be purchased by the U.S. Underwriters and the International
      Managers from the Company have been duly authorized for issuance and sale
      to the U.S. Underwriters pursuant to this Agreement and the International
      Managers pursuant to the International Purchase Agreement, respectively,
      and, when issued and delivered by the Company pursuant to this Agreement
      and the International Purchase Agreement, respectively, against payment of
      the consideration set forth herein and the International Purchase
      Agreement, respectively, will be validly issued, fully paid and
      non-assessable; the Common Stock conforms to all statements relating
      thereto contained in the Prospectuses and such description conforms to the
      rights set forth in the instruments defining the same; no holder of the
      Securities will be subject to personal liability by reason of being such a
      holder; and the issuance of the Securities is not subject to the
      preemptive or other similar rights of any security holder of the Company.

                  (x) Absence of Defaults and Conflicts. Neither the Company nor
                      ---------------------------------
      any of its subsidiaries is in violation of its charter or by-laws or in
      default in the performance or observance of any obligation, agreement,
      covenant or condition contained in any contract, indenture, mortgage, deed
      of trust, loan or credit agreement, note, lease or other agreement or
      instrument to which the Company or any of its subsidiaries is a party or
      by which it or any of them may be bound, or to which any of the property
      or assets of the Company or any subsidiary is subject (collectively,
      "Agreements and Instruments") except for such defaults that would not
      result in a Material Adverse Effect; and the execution, delivery and
      performance of this Agreement and the International Purchase Agreement and
      the consummation of the transactions contemplated in this Agreement, the
      International Purchase Agreement and in the Registration Statement
      (including the issuance and sale of the Securities and the use of a
      portion of the proceeds from the sale of the Securities to repay
      indebtedness as described in the Prospectuses under the caption "Use of
      Proceeds") and compliance by the Company with its obligations under this
      Agreement and the International Purchase Agreement have been duly
      authorized by all necessary corporate action and do not and will not,
      whether with or without the giving of notice or passage of time or both,
      conflict with or constitute a breach of, or default or Repayment Event (as
      defined below) under, or result in the creation or imposition of any lien,
      charge or

                                       7
<PAGE>
 
      encumbrance upon any property or assets of the Company or any subsidiary
      pursuant to, the Agreements and Instruments (except for such conflicts,
      breaches or defaults or liens, charges or encumbrances that would not
      result in a Material Adverse Effect), nor will such action result in any
      violation of the provisions of the charter or by-laws of the Company or
      any subsidiary or any applicable law, statute, rule, regulation, judgment,
      order, writ or decree of any government, government instrumentality or
      court, domestic or foreign, having jurisdiction over the Company or any
      subsidiary or any of their assets, properties or operations. As used
      herein, a "Repayment Event" means any event or condition which gives the
      holder of any note, debenture or other evidence of indebtedness (or any
      person acting on such holder's behalf) the right to require the
      repurchase, redemption or repayment of all or a portion of such
      indebtedness by the Company or any subsidiary.

                  (xi) Absence of Labor Dispute. No labor dispute with the
                       ------------------------
      employees of the Company or any subsidiary exists or, to the knowledge of
      the Company, is imminent, and the Company is not aware of any existing or
      imminent labor disturbance by the employees of any of its or any
      subsidiary's principal suppliers, manufacturers, customers or contractors,
      which, in either case, may reasonably be expected to result in a Material
      Adverse Effect.

                  (xii) Absence of Proceedings. There is no action, suit,
                        ----------------------
      proceeding, inquiry or investigation before or brought by any court or
      governmental agency or body, domestic or foreign, now pending, or, to the
      knowledge of the Company, threatened, against or affecting the Company or
      any subsidiary, which is required to be disclosed in the Registration
      Statement (other than as disclosed therein), or which might reasonably be
      expected to result in a Material Adverse Effect, or which might reasonably
      be expected to materially and adversely affect the consummation of the
      transactions contemplated in this Agreement and the International Purchase
      Agreement or the performance by the Company of its obligations hereunder
      or thereunder; the aggregate of all pending legal or governmental
      proceedings to which the Company or any subsidiary is a party or of which
      any of their respective property or assets is the subject which are not
      described in the Registration Statement, including ordinary routine
      litigation incidental to the business, could not reasonably be expected to
      result in a Material Adverse Effect.

                  (xiii) Accuracy of Representations and Warranties. To the
                         ------------------------------------------
      knowledge of the Company, the representations and warranties made by each
      of the Initial Acquired Companies (as defined in the Registration
      Statement and the Prospectuses) and the selling stockholders in the
      respective agreements pursuant to which the Company acquired the Initial
      Acquired Companies did not as of the respective dates thereof contain any
      inaccuracies that might, singly or in the aggregate, reasonably be
      expected to have a Material Adverse Effect.

                  (xiv) Accuracy of Exhibits. There are no contracts or
                        --------------------
      documents which are required to be described in the Registration Statement
      or the Prospectuses or to be filed as exhibits thereto which have not been
      so described and filed as required.

                                       8
<PAGE>
 
                  (xv) Possession of Intellectual Property. The Company and its
                       -----------------------------------
      subsidiaries own or possess, or can acquire on reasonable terms, adequate
      patents, patent rights, licenses, inventions, copyrights, know-how
      (including trade secrets and other unpatented and/or unpatentable
      proprietary or confidential information, systems or procedures),
      trademarks, service marks, trade names or other intellectual property
      (collectively, "Intellectual Property") necessary to carry on the business
      now operated by them, and neither the Company nor any of its subsidiaries
      has received any notice or is otherwise aware of any infringement of or
      conflict with asserted rights of others with respect to any Intellectual
      Property or of any facts or circumstances which would render any
      Intellectual Property invalid or inadequate to protect the interest of the
      Company or any of its subsidiaries therein, and which infringement or
      conflict (if the subject of any unfavorable decision, ruling or finding)
      or invalidity or inadequacy, singly or in the aggregate, would result in a
      Material Adverse Effect.

                  (xvi) Absence of Further Requirements. No filing with, or
                        -------------------------------
      authorization, approval, consent, license, order, registration,
      qualification or decree of, any court or governmental authority or agency
      is necessary or required for the performance by the Company of its
      obligations hereunder, in connection with the offering, issuance or sale
      of the Securities under this Agreement and the International Purchase
      Agreement or the consummation of the transactions contemplated by this
      Agreement and the International Purchase Agreement, except (i) such as
      have been already obtained or as may be required under the 1933 Act or the
      1933 Act Regulations, the 1934 Act and the rules and regulations of the
      Commission under the 1934 Act (the "1934 Act Regulations") and foreign or
      state securities or blue sky laws and (ii) such as may have been obtained
      under the laws and regulations of Switzerland, pursuant to the offering of
      the Reserved Securities.

                  (xvii) Possession of Licenses and Permits. The Company and its
                         ----------------------------------
      subsidiaries possess such permits, licenses, approvals, consents and other
      authorizations (collectively, "Governmental Licenses") issued by the
      appropriate federal, state, local or foreign regulatory agencies or bodies
      necessary to conduct the business now operated by them, except where the
      failure to so possess such Government Licenses would not, singly or in the
      aggregate, have a Material Adverse Effect; the Company and its
      subsidiaries are in compliance with the terms and conditions of all such
      Governmental Licenses, except where the failure so to comply would not,
      singly or in the aggregate, have a Material Adverse Effect; all of the
      Governmental Licenses are valid and in full force and effect, except when
      the invalidity of such Governmental Licenses or the failure of such
      Governmental Licenses to be in full force and effect would not have,
      singly or in the aggregate, a Material Adverse Effect; and neither the
      Company nor any of its subsidiaries has received any notice of proceedings
      relating to the revocation or modification of any such Governmental
      Licenses which, singly or in the aggregate, if the subject of an
      unfavorable decision, ruling or finding, would result in a Material
      Adverse Effect.

                                       9
<PAGE>
 
                  (xviii) Title to Property. The Company and its subsidiaries
                          -----------------
      have good and marketable title to all real property described in the
      Prospectus as owned by the Company and its subsidiaries and good title to
      all other properties described in the Prospectus as owned by them, in each
      case, free and clear of all mortgages, pledges, liens, security interests,
      claims, restrictions or encumbrances of any kind except such as (a) are
      described in the Prospectuses or are not required to be described therein
      pursuant to the 1933 Act or the 1933 Act Regulations or (b) do not, singly
      or in the aggregate, materially interfere with the use made and proposed
      to be made of such property by the Company or any of its subsidiaries; and
      all of the leases and subleases material to the business of the Company
      and its subsidiaries, considered as one enterprise, and under which the
      Company or any of its subsidiaries holds properties described in the
      Prospectuses, are in full force and effect, and neither the Company nor
      any subsidiary has any notice of any material claim of any sort that has
      been asserted by anyone adverse to the rights of the Company or any
      subsidiary under any of the leases or subleases mentioned above, or
      affecting or questioning the rights of the Company or such subsidiary to
      the continued possession of the leased or subleased premises under any
      such lease or sublease, which claim, if upheld, would result in a Material
      Adverse Effect.

                  (xix) Investment Company Act. The Company is not, and upon the
                        ----------------------
      issuance and sale of the Securities as herein contemplated and the
      application of the net proceeds therefrom as described in the Prospectuses
      will not be, an "investment company" or an entity "controlled" by an
      "investment company" as such terms are defined in the Investment Company
      Act of 1940, as amended (the "1940 Act").

                  (xx) Environmental Laws. Except as described in the
                       ------------------
      Registration Statement or except as would not, singly or in the aggregate,
      result in a Material Adverse Effect or except as would not be required to
      be described in the Registration Statement or the Prospectuses pursuant to
      the 1933 Act or the 1933 Act Regulations: (A) neither the Company nor any
      of its subsidiaries is in violation of any federal, state, local or
      foreign statute, law, rule, regulation, ordinance, code, policy or rule of
      common law or any judicial or administrative interpretation thereof,
      including any judicial or administrative order, consent, decree or
      judgment, relating to pollution or protection of human health, the
      environment (including, without limitation, ambient air, surface water,
      groundwater, land surface or subsurface strata) or wildlife, including,
      without limitation, laws and regulations relating to the release or
      threatened release of chemicals, pollutants, contaminants, wastes, toxic
      substances, hazardous substances, petroleum or petroleum products
      (collectively, "Hazardous Materials") or to the manufacture, processing,
      distribution, use, treatment, storage, disposal, transport or handling of
      Hazardous Materials (collectively, "Environmental Laws"), (B) neither the
      Company nor any of its subsidiaries is lacking any permits, authorizations
      and approvals required under any applicable Environmental Laws or are in
      violation of the requirements of such Environmental Laws, (C) there are no
      pending or to the best knowledge of the Company, threatened
      administrative, regulatory or judicial actions, suits, demands, demand
      letters,

                                       10
<PAGE>
 
      claims, liens, notices of noncompliance or violation, investigation or
      proceedings relating to any Environmental Law against the Company or any
      of its subsidiaries and (D) to the knowledge of the Company there are no
      events or circumstances that might reasonably be expected to form the
      basis of an order for clean-up or remediation, or an action, suit or
      proceeding by any private party or governmental body or agency, against or
      affecting the Company or any of its subsidiaries relating to Hazardous
      Materials or any Environmental Laws.

                  (xxi) Statistical and Market Data. Nothing has come to the
                         --------------------------
      attention of the Company that has caused the Company to believe that the
      statistical and market-related data included in the Prospectus are not
      based on or derived from sources that are reliable and accurate in all
      material respects.

                  (xxii) Taxes. The Company and each of its subsidiaries have
                         -----
      filed all necessary federal, state, local and foreign income, payroll,
      franchise and other tax returns (after giving effect to extensions) and
      have paid all taxes shown as due thereon or with respect to the Company or
      any of its properties (except where the failure to so file or pay would
      not, singly or in the aggregate, have a Material Adverse Effect), and
      there is no tax deficiency that has been, or to the knowledge of the
      Company is likely to be, asserted against the Company, any of its
      subsidiaries or any of their properties or assets that would result in a
      Material Adverse Effect, except for taxes that are being contested in good
      faith by appropriate proceedings and with respect to which the Company has
      established adequate reserves in accordance with GAAP.

                  (xxiii) Insurance. Neither the Company nor any subsidiary has
                          ---------
      received notice from any insurer providing insurance coverage for the
      Company and its Subsidiaries or agent of such insurer that capital
      improvements or other expenditures will have to be made in order to
      continue present insurance coverage, except such as could not reasonably
      be expected, singularly or in the aggregate, to have a Material Adverse
      Effect.

                  (xxiv) Maintenance of Sufficient Internal Controls. The
                         -------------------------------------------
      Company and its subsidiaries maintain a system of internal accounting
      controls sufficient to provide reasonable assurances that (i) transactions
      are executed in accordance with management's general or specific
      authorization; (ii) transactions are recorded as necessary to permit
      preparation of financial statements in conformity with generally accepted
      accounting principles and to maintain accountability for assets; (iii)
      access to assets is permitted only in accordance with management's general
      or specific authorization; and (iv) the recorded accountability for assets
      is compared with existing assets at reasonable intervals and appropriate
      action is taken with respect to any differences.

                  (xxv) Registration Rights. There are no persons with
                        -------------------
      registration rights or other similar rights to have any securities
      registered pursuant to the Registration Statement.

                                       11
<PAGE>
 
                  (xxvi) Fees. Other than pursuant to this Agreement, the
                         ----
      International Purchase Agreement or as described in the Registration
      Statement and the Prospectuses, there are no contracts, agreements or
      understandings between either the Company or its subsidiaries and any
      person that give rise to a valid claim against the Company, any of its
      subsidiaries or any of the Underwriters for a brokerage commission,
      finder's fee or other like payment relating to the transactions
      contemplated hereby.

      (b) Officer's Certificates. Any certificate signed by any officer of the
Company or any of its subsidiaries delivered to the Global Coordinator, the U.S.
Representatives or to counsel for the U.S. Underwriters shall be deemed a
representation and warranty by the Company to each U.S. Underwriter as to the
matters covered thereby.

      SECTION 2.        Sale and Delivery to U.S. Underwriters; Closing.
                        -----------------------------------------------

      (a) Initial Securities. On the basis of the representations and warranties
herein contained and subject to the terms and conditions herein set forth, the
Company agrees to sell to each U.S. Underwriter, severally and not jointly, and
each U.S. Underwriter, severally and not jointly, agrees to purchase from the
Company, at the price per share set forth in Schedule B, the number of Initial
U.S. Securities set forth in Schedule A opposite the name of such U.S.
Underwriter, plus any additional number of Initial U.S. Securities which such
Underwriter may become obligated to purchase pursuant to the provisions of
Section 10 hereof.

      (b) Option Securities. In addition, on the basis of the representations
and warranties herein contained and subject to the terms and conditions herein
set forth, the Company hereby grants an option to the U.S. Underwriters,
severally and not jointly, to purchase up to an additional 840,000 shares of
Common Stock at the price per share set forth in Schedule B, less an amount per
share equal to any dividends or distributions declared by the Company and
payable on the Initial U.S. Securities but not payable on the U.S. Option
Securities. The option hereby granted will expire 30 days after the date hereof
and may be exercised in whole or in part from time to time only for the purpose
of covering over-allotments which may be made in connection with the offering
and distribution of the Initial U.S. Securities upon notice by the Global
Coordinator to the Company setting forth the number of U.S. Option Securities as
to which the several U.S. Underwriters are then exercising the option and the
time and date of payment and delivery for such U.S. Option Securities. Any such
time and date of delivery for the U.S. Option Securities (a "Date of Delivery")
shall be determined by the Global Coordinator, but shall not be earlier than
three or later than seven full business days after the exercise of said option
or at such earlier time as may be agreed upon by the Global Coordinator and the
Company, nor in any event prior to the Closing Time, as hereinafter defined. If
the option is exercised as to all or any portion of the U.S. Option Securities,
each of the U.S. Underwriters, acting severally and not jointly, will purchase
that proportion of the total number of U.S. Option Securities then being
purchased which the number of Initial U.S. Securities set forth in Schedule A
opposite the name of such U.S. Underwriter bears to the total number of Initial
U.S. Securities, subject in each case

                                       12
<PAGE>
 
to such adjustments as the Global Coordinator in its discretion shall make to
eliminate any sales or purchases of fractional shares.

      (c) Payment. Payment of the purchase price for, and delivery of
certificates for, the Initial Securities shall be made at the offices of
Skadden, Arps, Slate, Meagher & Flom LLP, 919 Third Avenue, New York, New York
10022, or at such other place as shall be agreed upon by the Global Coordinator
and the Company, at 9:00 A.M. (Eastern time) on the third (fourth, if the
pricing occurs after 4:30 P.M. (Eastern time) on any given day) business day
after the date hereof (unless postponed in accordance with the provisions of
Section 10), or such other time not later than ten business days after such date
as shall be agreed upon by the Global Coordinator and the Company (such time and
date of payment and delivery being herein called "Closing Time").

      In addition, in the event that any or all of the U.S. Option Securities
are purchased by the U.S. Underwriters, payment of the purchase price for, and
delivery of certificates for, such U.S. Option Securities shall be made at the
above-mentioned offices, or at such other place as shall be agreed upon by the
Global Coordinator and the Company, on each Date of Delivery as specified in the
notice from the Global Coordinator to the Company.

      Payment shall be made to the Company by wire transfer of immediately
available funds to a bank account designated by the Company, against delivery to
the U.S. Representatives for the respective accounts of the U.S. Underwriters of
certificates for the U.S. Securities to be purchased by them. It is understood
that each U.S. Underwriter has authorized the U.S. Representatives, for its
account, to accept delivery of, receipt for, and make payment of the purchase
price for, the Initial U.S. Securities and the U.S. Option Securities, if any,
which it has agreed to purchase. Merrill Lynch, individually and not as
representative of the U.S. Underwriters, may (but shall not be obligated to)
make payment of the purchase price for the Initial U.S. Securities or the U.S.
Option Securities, if any, to be purchased by any U.S. Underwriter whose funds
have not been received by the Closing Time or the relevant Date of Delivery, as
the case may be, but such payment shall not relieve such U.S. Underwriter from
its obligations hereunder.

      (d) Denominations; Registration. Certificates for the Initial U.S.
Securities and the U.S. Option Securities, if any, shall be in such
denominations and registered in such names as the U.S. Representatives may
request in writing at least one full business day before the Closing Time or the
relevant Date of Delivery, as the case may be. The certificates for the Initial
U.S. Securities and the U.S. Option Securities, if any, will be made available
for examination and packaging by the U.S. Representatives in The City of New
York not later than 10:00 A.M. (Eastern time) on the business day prior to the
Closing Time or the relevant Date of Delivery, as the case may be.

      SECTION 3.  Covenants of the Company. The Company covenants with each U.S.
                  ------------------------ 
Underwriter as follows:

                                       13
<PAGE>
 
                  (a) Compliance with Securities Regulations and Commission
      Requests. The Company, subject to Section 3(b), will comply with the
      requirements of Rule 430A or Rule 434, as applicable, and will notify the
      Global Coordinator immediately, and confirm the notice in writing, (i)
      when any post-effective amendment to the Registration Statement shall
      become effective, or any supplement to the Prospectuses or any amended
      Prospectuses shall have been filed, (ii) of the receipt of any comments
      from the Commission, (iii) of any request by the Commission for any
      amendment to the Registration Statement or any amendment or supplement to
      the Prospectuses or for additional information, and (iv) of the issuance
      by the Commission of any stop order suspending the effectiveness of the
      Registration Statement or of any order preventing or suspending the use of
      any preliminary prospectus, or of the suspension of the qualification of
      the Securities for offering or sale in any jurisdiction, or of the
      initiation or threatening of any proceedings for any of such purposes. The
      Company will promptly effect the filings necessary pursuant to Rule 424(b)
      and will take such steps as it deems necessary to ascertain promptly
      whether the form of prospectus transmitted for filing under Rule 424(b)
      was received for filing by the Commission and, in the event that it was
      not, it will promptly file such prospectus. The Company will make every
      reasonable effort to prevent the issuance of any stop order and, if any
      stop order is issued, to obtain the lifting thereof at the earliest
      possible moment.

                  (b) Filing of Amendments. The Company will give the Global
      Coordinator notice of its intention to file or prepare any amendment to
      the Registration Statement (including any filing under Rule 462(b)), any
      Term Sheet or any amendment, supplement or revision to either the
      prospectus included in the Registration Statement at the time it became
      effective or to the Prospectuses, will furnish the Global Coordinator with
      copies of any such documents a reasonable amount of time prior to such
      proposed filing or use, as the case may be, and will not file or use any
      such document to which the Global Coordinator or counsel for the U.S.
      Underwriters shall object.

                  (c) Delivery of Registration Statements. The Company has
      furnished or will deliver to the U.S. Representatives and counsel for the
      U.S. Underwriters, without charge, signed copies of the Registration
      Statement as originally filed and of each amendment thereto (including
      exhibits filed therewith or incorporated by reference therein) and signed
      copies of all consents and certificates of experts, and will also deliver
      to the U.S. Representatives, without charge, a conformed copy of the
      Registration Statement as originally filed and of each amendment thereto
      (without exhibits) for each of the U.S. Underwriters. The copies of the
      Registration Statement and each amendment thereto furnished to the U.S.
      Underwriters will be identical to the electronically transmitted copies
      thereof filed with the Commission pursuant to EDGAR, except to the extent
      permitted by Regulation S-T.

                  (d) Delivery of Prospectuses. The Company has delivered to
      each U.S. Underwriter, without charge, as many copies of each preliminary
      prospectus as such U.S.

                                       14
<PAGE>
 
      Underwriter reasonably requested, and the Company hereby consents to the
      use of such copies for purposes permitted by the 1933 Act. The Company
      will furnish to each U.S. Underwriter, without charge, during the period
      when the U.S. Prospectus is required to be delivered under the 1933 Act or
      the Securities Exchange Act of 1934 (the "1934 Act"), such number of
      copies of the U.S. Prospectus (as amended or supplemented) as such U.S.
      Underwriter may reasonably request. The U.S. Prospectus and any amendments
      or supplements thereto furnished to the U.S. Underwriters will be
      identical to the electronically transmitted copies thereof filed with the
      Commission pursuant to EDGAR, except to the extent permitted by Regulation
      S-T.

                  (e) Continued Compliance with Securities Laws. The Company
      will comply with the 1933 Act and the 1933 Act Regulations so as to permit
      the completion of the distribution of the Securities as contemplated in
      this Agreement, the International Purchase Agreement and in the
      Prospectuses. If at any time when a prospectus is required by the 1933 Act
      to be delivered in connection with sales of the Securities, any event
      shall occur or condition shall exist as a result of which it is necessary,
      in the opinion of counsel for the U.S. Underwriters or for the Company, to
      amend the Registration Statement or amend or supplement any Prospectus in
      order that the Prospectuses will not include any untrue statements of a
      material fact or omit to state a material fact necessary in order to make
      the statements therein not misleading in the light of the circumstances
      existing at the time it is delivered to a purchaser, or if it shall be
      necessary, in the opinion of such counsel, at any such time to amend the
      Registration Statement or amend or supplement any Prospectus in order to
      comply with the requirements of the 1933 Act or the 1933 Act Regulations,
      the Company will promptly prepare and file with the Commission, subject to
      Section 3(b), such amendment or supplement as may be necessary to correct
      such statement or omission or to make the Registration Statement or the
      Prospectuses comply with such requirements, and the Company will furnish
      to the U.S. Underwriters such number of copies of such amendment or
      supplement as the U.S. Underwriters may reasonably request.

                  (f) Blue Sky Qualifications. The Company will use its best
      efforts, in cooperation with the U.S. Underwriters, to qualify the
      Securities for offering and sale under the applicable securities laws of
      such states and other jurisdictions (domestic or foreign) as the Global
      Coordinator may designate and to maintain such qualifications in effect
      for a period of not less than one year from the later of the effective
      date of the Registration Statement and any Rule 462(b) Registration
      Statement; provided, however, that the Company shall not be obligated to
      file any general consent to service of process or to qualify as a foreign
      corporation or as a dealer in securities in any jurisdiction in which it
      is not so qualified or to subject itself to taxation in respect of doing
      business in any jurisdiction in which it is not otherwise so subject. In
      each jurisdiction in which the Securities have been so qualified, the
      Company will file such statements and reports as may be required by the
      laws of such jurisdiction to continue such qualification in effect for

                                       15
<PAGE>
 
      a period of not less than one year from the effective date of the
      Registration Statement and any Rule 462(b) Registration Statement.

                  (g) Rule 158. The Company will timely file such reports
      pursuant to the 1934 Act as are necessary in order to make generally
      available to its securityholders as soon as practicable an earnings
      statement for the purposes of, and to provide the benefits contemplated
      by, the last paragraph of Section 11(a) of the 1933 Act.

                  (h) Use of Proceeds. The Company will use the net proceeds
      received by it from the sale of the Securities in the manner specified in
      the Prospectuses under "Use of Proceeds".

                  (i) Listing. The Company will use its best efforts to effect
      the listing of the Common Stock (including the Securities) on the New York
      Stock Exchange.

                  (j) Restriction on Sale of Securities. During a period of 180
      days from the date of the Prospectuses, the Company will not, without the
      prior written consent of the Global Coordinator on behalf of the
      Underwriters, (i) directly or indirectly, offer, pledge, sell, contract to
      sell, sell any option or contract to purchase, purchase any option or
      contract to sell, grant any option, right or warrant for the sale of or
      otherwise dispose of or transfer any share of Common Stock or any
      securities convertible into or exchangeable or exercisable for Common
      Stock, whether now owned or hereafter acquired or with respect to which
      the power of disposition is acquired, or file any registration statement
      under the 1933 Act with respect to any of the foregoing (other than as
      contemplated in (E), (F) and (G) below), (ii) enter into any swap or any
      other agreement or any transaction that transfers, in whole or in part,
      directly or indirectly, the economic consequence of ownership of the
      Common Stock, whether any such swap or transaction is to be settled by
      delivery of Common Stock or other securities, in cash or otherwise, or
      (iii) waive any Stockholder Lock-up Agreement (as such term is defined in
      the Registration Statement and the Prospectuses). Clauses (i) and (ii) of
      the foregoing sentence shall not limit the Company's ability (A) to sell
      the Securities hereunder or under the International Purchase Agreement,
      (B) to issue shares of Common Stock upon the exercise of an option or
      warrant or the conversion of a security outstanding on the date hereof and
      referred to in the Prospectuses, (C) to grant stock options under the 1997
      Stock Option Plan (as such term is defined in the Registration Statement
      and the Prospectuses), (D) to issue shares of Common Stock as
      consideration for future acquisitions, provided, however, that the Company
      may not issue in excess of 500,000 shares for acquisitions unless the
      recipients of such excess shares enter into agreements containing the
      limitations set forth in the first sentence of this paragraph with respect
      to such additional shares, (E) to file a shelf registration statement
      pursuant to Rule 415 under the 1933 Act relating to (a) shares of Common
      Stock outstanding as of the date of the Prospectuses and (b) shares of
      Common Stock underlying warrants or convertible notes outstanding as of
      the date of the Prospectuses, provided, however, that no sales of Common
      Stock may be made pursuant

                                       16
<PAGE>
 
      to such registration statement during the period of 180 days from the date
      of the Prospectuses, (F) to file a registration statement under the 1933
      Act with respect to shares of Common Stock or other securities to be
      issued after the date hereof as consideration for an acquisition or with
      respect to the potential resale of shares issued after the date hereof as
      consideration for an acquisition, provided, however, that no sales may be
      made pursuant to such registration statement except to the extent
      permitted by clause (D) hereof, or (G) file a registration statement under
      the 1933 Act registering the shares of Common Stock that may be issued
      pursuant to options granted or to be granted under the 1997 Stock Option
      Plan. In addition to the foregoing, the Company will (i) require any
      individual who becomes an officer or director of the Company and purchases
      shares of Common Stock of the Company subsequent to the date of the
      Prospectuses to enter into a Lock-up Agreement in the form contained in
      Exhibit B hereto and (ii) in the event any registration rights are granted
      by the Company in regard to shares of Common Stock issuable upon the
      conversion of any outstanding securities of the Company (as contemplated
      in (B) above, and including, but not limited to, a $300,000 principal
      amount note issued as consideration for the acquisition of one of the
      Initial Acquired Companies), also require the holders of shares of Common
      Stock that are the subject of such registration rights to enter into a
      Lock-up Agreement in the form of Exhibit B hereto.

                  (k) Reporting Requirements. The Company, during the period
      when the Prospectuses are required to be delivered under the 1933 Act or
      the 1934 Act, will file all documents required to be filed with the
      Commission pursuant to the 1934 Act within the time periods required by
      the 1934 Act and the rules and regulations of the Commission thereunder.

                  (l) Compliance with NASD Rules. The Company will ensure that
      the Reserved Securities will be restricted as required by the NASD or the
      NASD rules from sale, transfer, assignment, pledge or hypothecation for a
      period of three months following the date of this Agreement. The
      Underwriters will notify the Company as to which Reserved Securities will
      need to be so restricted under applicable NASD rules. At the request of
      the Underwriters, the Company will direct the transfer agent to place a
      stop transfer restriction upon such securities for up to three months as
      specified by the Underwriters. Without the prior written consent of
      Merrill Lynch, the Company will not release any such stop transfer or any
      lock-up agreement entered into for the purpose of complying with NASD
      rules and requirements. Should the Company release, or seek to release,
      any of the Reserved Securities from the foregoing restrictions, the
      Company agrees to reimburse the Underwriters for any reasonable expenses
      (including, without limitation, legal expenses) they incur in connection
      with such release.

                  (m) Compliance with Rule 463. The Company will file with the
      Commission such information as may be required pursuant to Rule 463 of the
      1933 Act Regulations.

                                       17
<PAGE>
 
      SECTION 4. Payment of Expenses. (a) Expenses. The Company will pay all
                 -------------------
expenses incident to the performance of its obligations under this Agreement,
including (i) the preparation, printing and filing of the Registration Statement
(including financial statements and exhibits) as originally filed and of each
amendment thereto, (ii) the preparation, printing and delivery to the
Underwriters of this Agreement, the International Purchase Agreement, the
Inter-Syndicate Agreement any Agreement among Underwriters and such other
documents as may be required in connection with the offering, purchase, sale,
issuance or delivery of the Securities, (iii) the preparation, issuance and
delivery of the certificates for the Securities to the Underwriters, including
any stock or other transfer taxes and any stamp or other duties payable upon the
sale, issuance or delivery of the Securities to the Underwriters and the
transfer of the Securities between the U.S. Underwriters and the International
Managers, (iv) the fees and disbursements of the Company's counsel, accountants
and other advisors, (v) the qualification of the Securities under securities
laws in accordance with the provisions of Section 3(f) hereof, including filing
fees and the reasonable fees and disbursements of counsel for the Underwriters
in connection therewith and in connection with the preparation of the Blue Sky
Survey and any supplement thereto, (vi) the printing and delivery to the
Underwriters of copies of each preliminary prospectus, any Term Sheets and of
the Prospectuses and any amendments or supplements thereto, (vii) the
preparation, printing and delivery to the Underwriters of copies of the Blue Sky
Survey and any supplement thereto, (viii) the fees and expenses of any transfer
agent or registrar for the Securities, (ix) the filing fees incident to, and the
reasonable fees and disbursements of counsel to the Underwriters in connection
with, the review by the NASD of the terms of the sale of the Securities, (x) the
fees and expenses incurred in connection with the listing of the Securities on
the New York Stock Exchange and (xi) all costs and expenses of the Underwriters,
including the fees and disbursements of counsel for the Underwriters, in
connection with matters related to the Reserved Securities which are designated
by the Company for sale to certain employees, directors and business associates
of, and certain other persons designated by, the Company.

      (b) Termination of Agreement. If this Agreement is terminated by the U.S.
Representatives in accordance with the provisions of Section 5 or Section
9(a)(i) hereof, the Company shall reimburse the U.S. Underwriters for all of
their reasonable out-of-pocket expenses, including the reasonable fees and
disbursements of counsel for the U.S. Underwriters.

      SECTION 5. Conditions of U.S. Underwriters' Obligations. The obligations
                 --------------------------------------------
of the several U.S. Underwriters hereunder are subject to the accuracy of the
representations and warranties of the Company contained in Section 1 hereof or
in certificates of any officer of the Company or any subsidiary of the Company
delivered pursuant to the provisions hereof, to the performance by the Company
of its covenants and other obligations hereunder, and to the following further
conditions:

                  (a) Effectiveness of Registration Statement. The Registration
      Statement, including any Rule 462(b) Registration Statement, has become
      effective and at Closing Time no stop order suspending the effectiveness
      of the Registration Statement shall have been issued under the 1933 Act or
      proceedings therefor initiated or threatened by the

                                       18
<PAGE>
 
      Commission, and any request on the part of the Commission for additional
      information shall have been complied with to the reasonable satisfaction
      of counsel to the U.S. Underwriters. A prospectus containing the Rule 430A
      Information shall have been filed with the Commission in accordance with
      Rule 424(b) (or a post-effective amendment providing such information
      shall have been filed and declared effective in accordance with the
      requirements of Rule 430A) or, if the Company has elected to rely upon
      Rule 434, a Term Sheet shall have been filed with the Commission in
      accordance with Rule 424(b).

                  (b) Opinions of Counsel for Company. At Closing Time, the U.S.
      Representatives shall have received the favorable opinions, dated as of
      Closing Time, of Ehrenreich Eilenberg Krause & Zivian LLP and Weil,
      Gotshal & Manges LLP, counsel for the Company, in form and substance
      reasonably satisfactory to counsel for the U.S. Underwriters, together
      with signed or reproduced copies of such letters for each of the other
      U.S. Underwriters to the effect set forth in Exhibits A-1 and A-2,
      respectively, hereto and to such further effect as counsel to the U.S.
      Underwriters may reasonably request. In giving such opinions, such counsel
      may rely, as to all matters governed by the laws of jurisdictions other
      than the law of the State of New York, the federal law of the United
      States and the General Corporation Law of the State of Delaware, upon the
      opinions of counsel reasonably satisfactory to counsel to the U.S.
      Underwriters. Such counsel may also state that, insofar as such opinions
      involve factual matters, they have relied, to the extent they deem proper,
      upon certificates of officers of the Company and its subsidiaries and
      certificates of public officials.

                  (c) Opinion of Counsel for U.S. Underwriters. At Closing Time,
      the U.S. Representatives shall have received the favorable opinion, dated
      as of Closing Time, of Skadden, Arps, Slate, Meagher & Flom LLP, counsel
      for the U.S. Underwriters, together with signed or reproduced copies of
      such letter for each of the other U.S. Underwriters in form and substance
      reasonably satisfactory to the U.S. Underwriters. In giving such opinion
      such counsel may rely, as to all matters governed by the laws of
      jurisdictions other than the law of the State of New York, the federal law
      of the United States and the General Corporation Law of the State of
      Delaware, upon the opinions of counsel satisfactory to the U.S.
      Representatives. Such counsel may also state that, insofar as such opinion
      involves factual matters, they have relied, to the extent they deem
      proper, upon certificates of officers of the Company and its subsidiaries
      and certificates of public officials.

                  (d) Officers' Certificate. At Closing Time, there shall not
      have been, since the date hereof or since the respective dates as of which
      information is given in the Prospectuses, any material adverse change in
      the condition, financial or otherwise, or in the earnings, business
      affairs or business prospects of the Company and its subsidiaries
      considered as one enterprise, whether or not arising in the ordinary
      course of business, and the U.S. Representatives shall have received a
      certificate of the Chief Executive Officer of the Company and of the Chief
      Financial Officer of the Company, dated as of

                                       19
<PAGE>
 
      Closing Time, to the effect that (i) there has been no such material
      adverse change, (ii) the representations and warranties in Section 1(a)
      hereof are true and correct with the same force and effect as though
      expressly made at and as of Closing Time, (iii) the Company has complied
      in all material respects with all agreements and satisfied all conditions
      on its part to be performed or satisfied at or prior to Closing Time, and
      (iv) no stop order suspending the effectiveness of the Registration
      Statement has been issued and no proceedings for that purpose have been
      instituted or are pending or, to the best knowledge of the Company, are
      contemplated by the Commission.

                  (e) Accountant's Comfort Letters. At the time of the execution
      of this Agreement, the U.S. Representatives shall have received from Ernst
      & Young LLP, Webster, Duke & Co. PA, KPMG Peat Marwick LLP and Grant
      Thornton, LLP letters dated such date, in form and substance satisfactory
      to the U.S. Representatives, together with signed or reproduced copies of
      such letters for each of the other U.S. Underwriters, to the effect set
      forth in Annex A hereto, containing statements and information of the type
      ordinarily included in accountants' "comfort letters" to underwriters with
      respect to the financial statements audited by such accountants and
      certain financial information contained in the Registration Statement and
      the Prospectuses.

                  (f) Bring-down Comfort Letters. At Closing Time, the U.S.
      Representatives shall have received from Ernst & Young LLP, Webster, Duke
      & Co. PA, KPMG Peat Marwick LLP and Grant Thornton, LLP letters, dated as
      of Closing Time, to the effect that they reaffirm the statements made in
      the letters furnished pursuant to subsection (e) of this Section 5, except
      that the specified date referred to shall be a date not more than three
      business days prior to Closing Time.

                  (g) Approval of Listing. At Closing Time, the Securities shall
      have been approved for listing on the New York Stock Exchange, subject
      only to official notice of issuance.

                  (h) No Objection. The NASD has confirmed that it has not
      raised any objection with respect to the fairness and reasonableness of
      the underwriting terms and arrangements.

                  (i) Lock-up Agreements. At the date of this Agreement, the
      U.S. Representatives shall have received an agreement substantially in the
      form of Exhibit B hereto signed by each of the persons listed on Schedule
      C hereto.

                  (j) Purchase of Initial International Securities.
      Contemporaneously with the purchase by the U.S. Underwriters of the
      Initial U.S. Securities under this Agreement, the International Managers
      shall have purchased the Initial International Securities under the
      International Purchase Agreement.

                                       20
<PAGE>
 
                  (k) Conditions to Purchase of U.S. Option Securities. In the
      event that the U.S. Underwriters exercise their option provided in Section
      2(b) hereof to purchase all or any portion of the U.S. Option Securities,
      the representations and warranties of the Company contained herein and the
      statements in any certificates furnished by the Company or any subsidiary
      of the Company hereunder shall be true and correct as of each Date of
      Delivery and, at the relevant Date of Delivery, the U.S. Representatives
      shall have received:

            (i) Officers' Certificate. A certificate, dated such Date of
                ---------------------
            Delivery, of the Chief Executive Officer of the Company and of the
            Chief Financial Officer of the Company confirming that the
            certificate delivered at the Closing Time pursuant to Section 5(d)
            hereof remains true and correct as of such Date of Delivery.

            (ii) Opinions of Counsel for Company. The favorable opinions of
                 -------------------------------
            Ehrenreich Eilenberg Krause & Zivian LLP and Weil, Gotshal & Manges
            LLP, counsel for the Company, in form and substance reasonably
            satisfactory to counsel for the U.S. Underwriters, dated such Date
            of Delivery, relating to the U.S. Option Securities to be purchased
            on such Date of Delivery and otherwise to the same effect as the
            opinions required by Section 5(b) hereof.

            (iii) Opinion of Counsel for U.S. Underwriters. The favorable
                  ----------------------------------------
            opinion of Skadden, Arps, Slate, Meagher & Flom, LLP, counsel for
            the U.S. Underwriters, dated such Date of Delivery, relating to the
            U.S. Option Securities to be purchased on such Date of Delivery and
            otherwise to the same effect as the opinion required by Section 5(c)
            hereof.

            (iv) Bring-down Comfort Letters. Letters from Ernst & Young LLP,
                 --------------------------
            Webster, Duke & Co. PA, KPMG Peat Marwick LLP and Grant Thornton
            LLP, in form and substance satisfactory to the U.S. Representatives
            and dated such Date of Delivery, substantially in the same form and
            substance as the letters furnished to the U.S. Representatives
            pursuant to Section 5(f) hereof, except that the "specified date" in
            the letters furnished pursuant to this paragraph shall be a date not
            more than five days prior to such Date of Delivery.

                  (l) Additional Documents. At Closing Time and at each Date of
      Delivery, counsel for the U.S. Underwriters shall have been furnished with
      such documents and opinions as they may reasonably require for the purpose
      of enabling them to pass upon the issuance and sale of the Securities as
      herein contemplated, or in order to evidence the accuracy of any of the
      representations or warranties, or the fulfillment of any of the
      conditions, herein contained; and all proceedings taken by the Company in
      connection with the issuance and sale of the Securities as herein
      contemplated shall be reasonably satisfactory in form and substance to the
      U.S. Representatives and counsel for the U.S. Underwriters.

                                       21
<PAGE>
 
                  (m) Termination of Agreement. If any condition specified in
      this Section shall not have been fulfilled when and as required to be
      fulfilled, this Agreement, or, in the case of any condition to the
      purchase of U.S. Option Securities on a Date of Delivery which is after
      the Closing Time, the obligations of the several U.S. Underwriters to
      purchase the relevant Option Securities, may be terminated by the U.S.
      Representatives by notice to the Company at any time at or prior to
      Closing Time or such Date of Delivery, as the case may be, and such
      termination shall be without liability of any party to any other party
      except as provided in Section 4 and except that Sections 1, 6, 7 and 8
      shall survive any such termination and remain in full force and effect.

      SECTION 6.  Indemnification.
                  ---------------  
      (a) Indemnification of U.S. Underwriters. The Company agrees to indemnify
and hold harmless each U.S. Underwriter and each person, if any, who controls
any U.S. Underwriter within the meaning of Section 15 of the 1933 Act or Section
20 of the 1934 Act as follows:

                  (i) against any and all loss, liability, claim, damage and
      expense whatsoever, as incurred, arising out of any untrue statement or
      alleged untrue statement of a material fact contained in the Registration
      Statement (or any amendment thereto), including the Rule 430A Information
      and the Rule 434 Information, if applicable, or the omission or alleged
      omission therefrom of a material fact required to be stated therein or
      necessary to make the statements therein not misleading or arising out of
      any untrue statement or alleged untrue statement of a material fact
      included in any preliminary prospectus or the Prospectuses (or any
      amendment or supplement thereto), or the omission or alleged omission
      therefrom of a material fact necessary in order to make the statements
      therein, in the light of the circumstances under which they were made, not
      misleading;

                  (ii) against any and all loss, liability, claim, damage and
      expense whatsoever, as incurred, arising out of (A) the violation of any
      applicable laws or regulations of Switzerland as a result of the offering
      of the Reserved Securities and (B) any untrue statement or alleged untrue
      statement of a material fact included in any supplement or prospectus
      wrapper material distributed in Switzerland in connection with the
      reservation and sale of the Reserved Securities to certain employees,
      directors and business associates of, and certain other persons designated
      by, the Company or the omission or alleged omission therefrom of a
      material fact necessary to make the statements therein, when considered in
      conjunction with the Prospectuses or preliminary prospectuses, not
      misleading;

                  (iii) against any and all loss, liability, claim, damage and
      expense whatsoever, as incurred, to the extent of the aggregate amount
      paid in settlement of any litigation, or any investigation or proceeding
      by any governmental agency or body, commenced or threatened, or of any
      claim whatsoever based upon any such untrue statement or omission, or any
      such alleged untrue statement or omission or in connection

                                       22
<PAGE>
 
      with any violation of the nature referred to in Section 6(a)(ii)(A)
      hereof; provided that (subject to Section 6(d) below) any such settlement
      is effected with the written consent of the Company; and

                  (iv) against any and all expense whatsoever, as incurred
      (including, subject to Section 6(c) hereof, the fees and disbursements of
      counsel chosen by Merrill Lynch), reasonably incurred in investigating,
      preparing or defending against any litigation, or any investigation or
      proceeding by any governmental agency or body, commenced or threatened, or
      any claim whatsoever based upon any such untrue statement or omission, or
      any such alleged untrue statement or omission or in connection with any
      violation of the nature referred to in Section 6(a)(ii)(A) hereof, to the
      extent that any such expense is not paid under (i), (ii) or (iii) above;

provided, however, that this indemnity agreement shall not apply to any loss,
- --------  -------
liability, claim, damage or expense to the extent arising out of any untrue
statement or omission or alleged untrue statement or omission made in reliance
upon and in conformity with written information furnished to the Company by any
U.S. Underwriter through the U.S. Representatives expressly for use in the
Registration Statement (or any amendment thereto), including the Rule 430A
Information and the Rule 434 Information, if applicable, or any preliminary
prospectus or the U.S. Prospectus (or any amendment or supplement thereto);
provided, further, that the Company will not be liable to any Underwriter or any
- --------  -------
person controlling such Underwriter with respect to any such untrue statement or
omission made in any Preliminary Prospectus that is corrected in the Prospectus
(or any amendment or supplement thereto) if the person asserting any such loss,
claim, damage or liability purchased Securities from such Underwriter but was
not sent or given a copy of the Prospectus (as amended or supplemented) at or
prior to the written confirmation of the sale of such Securities to such person
in any case where such delivery of the Prospectus (as amended or supplemented)
is required by the Act, unless such failure to deliver the Prospectus (as
amended or supplemented) was a result of noncompliance by the Company with
Sections 5(d) or 5(e) of this Agreement.

      (b) Indemnification of Company, Directors and Officers. Each U.S.
Underwriter severally agrees to indemnify and hold harmless the Company, its
directors, each of its officers who signed the Registration Statement, and each
person, if any, who controls the Company within the meaning of Section 15 of the
1933 Act or Section 20 of the 1934 Act against any and all loss, liability,
claim, damage and expense described in the indemnity contained in subsection (a)
of this Section, as incurred, but only with respect to untrue statements or
omissions, or alleged untrue statements or omissions, made in the Registration
Statement (or any amendment thereto), including the Rule 430A Information and
the Rule 434 Information, if applicable, or any preliminary U.S. prospectus or
the U.S. Prospectus (or any amendment or supplement thereto) in reliance upon
and in conformity with written information furnished to the Company by such U.S.
Underwriter through the U.S. Representatives expressly for use in the
Registration Statement (or any amendment thereto) or such preliminary prospectus
or the U.S. Prospectus (or any amendment or supplement thereto).

                                       23
<PAGE>
 
      (c) Actions against Parties; Notification. Each indemnified party shall
give notice as promptly as reasonably practicable to each indemnifying party of
any action commenced against it in respect of which indemnity may be sought
hereunder, but failure to so notify an indemnifying party shall not relieve such
indemnifying party from any liability hereunder to the extent it is not
materially prejudiced as a result thereof and in any event shall not relieve it
from any liability which it may have otherwise than on account of this indemnity
agreement. In the case of parties indemnified pursuant to Section 6(a) above,
counsel to the indemnified parties shall (subject to the following sentence) be
selected by Merrill Lynch, and, in the case of parties indemnified pursuant to
Section 6(b) above, counsel to the indemnified parties shall be selected by the
Company. In case any such action is brought against any indemnified party, and
it notifies the indemnifying party of the commencement thereof, the indemnifying
party will be entitled to participate therein and, to the extent that it may
wish, jointly with any other indemnifying party similarly notified, to assume
the defense thereof with counsel satisfactory to such indemnified party;
provided, however, that counsel to the indemnifying party shall not (except with
- --------  -------
the consent of the indemnified party) also be counsel to the indemnified party
and provided, further, that if the defendants in any such action include both
    --------  -------
the indemnified party and the indemnifying party and the indemnified party shall
have reasonably concluded that there may be one or more legal defenses available
to it and/or other indemnified parties which are different from or additional to
those available to the indemnifying party, the indemnifying party shall not have
the right to direct the defense of such action on behalf of such indemnified
party or parties and such indemnified party or parties shall have the right to
select separate counsel to defend such action on behalf of such indemnified
party or parties. In no event shall the indemnifying parties be liable for
fees and expenses of more than one counsel (in addition to any local counsel)
separate from their own counsel for all indemnified parties in connection with
any one action or separate but similar or related actions in the same
jurisdiction arising out of the same general allegations or circumstances; After
notice from the indemnifying party to such indemnified party of its election so
to assume the defense thereof and approval by such indemnified party of counsel
appointed to defend such action, the indemnifying party will not be liable to
such indemnified party under this Section 6 for any legal or other expenses,
other than reasonable costs of investigation, subsequently incurred by such
indemnified party in connection with the defense thereof, unless (i) the
indemnified party shall have employed separate counsel in accordance with the
proviso to the next preceding sentence (it being understood, however, that in
connection with such action the indemnifying party shall not be liable for the
expenses of more than one separate counsel (in addition to local counsel) in any
one action or separate but substantially similar actions in the same
jurisdiction arising out of the same general allegations or circumstances,
designated by the U.S. Representatives in the case of paragraph (a) of this
Section 6, representing the indemnified parties under such paragraph (a) who are
parties to such action or actions) or (ii) the indemnifying party does not
promptly retain counsel satisfactory to the indemnified party or (iii) the
indemnifying party has authorized the employment of counsel for the indemnified
party at the expense of the indemnifying party. The indemnifying party will not
be liable for the costs and expenses of any settlement of such action effected
by such indemnified party without the consent of the indemnifying party.

                                       24
<PAGE>
 
      No indemnifying party shall, without the prior written consent of the
indemnified parties, settle or compromise or consent to the entry of any
judgment with respect to any litigation, or any investigation or proceeding by
any governmental agency or body, commenced or threatened, or any claim
whatsoever in respect of which indemnification or contribution could be sought
under this Section 6 or Section 7 hereof (whether or not the indemnified parties
are actual or potential parties thereto), unless such settlement, compromise or
consent (i) includes an unconditional release of each indemnified party from all
liability arising out of such litigation, investigation, proceeding or claim and
(ii) does not include a statement as to or an admission of fault, culpability or
a failure to act by or on behalf of any indemnified party.

      (d) Settlement without Consent if Failure to Reimburse. If at any time an
indemnified party shall have requested an indemnifying party to reimburse the
indemnified party for fees and expenses of counsel, such indemnifying party
agrees that it shall be liable for any settlement of the nature contemplated by
Section 6(a)(ii) effected without its written consent if (i) such settlement is
entered into more than 45 days after receipt by such indemnifying party of the
aforesaid request, (ii) such indemnifying party shall have received notice of
the terms of such settlement at least 30 days prior to such settlement being
entered into and (iii) such indemnifying party shall not have reimbursed such
indemnified party in accordance with such request prior to the date of such
settlement.

      (e) Indemnification for Reserved Securities. In connection with the offer
and sale of the Reserved Securities, the Company agrees, promptly upon a
request, in writing to indemnify and hold harmless the Underwriters from and
against any and all losses, liabilities, claims, damages and expenses incurred
by them as a result of the failure of certain employees, directors and business
associates of, and certain other persons designated by, the Company to pay for
and accept delivery of Reserved Securities which, by the end of the first
business day following the date of this Agreement, were subject to a properly
confirmed agreement to purchase.

      SECTION 7. Contribution. If the indemnification provided for in Section 6
                 ------------
hereof is for any reason unavailable to or insufficient to hold harmless an
indemnified party in respect of any losses, liabilities, claims, damages or
expenses referred to therein, then each indemnifying party shall contribute to
the aggregate amount of such losses, liabilities, claims, damages and expenses
incurred by such indemnified party, as incurred, (i) in such proportion as is
appropriate to reflect the relative benefits received by the Company on the one
hand and the U.S. Underwriters on the other hand from the offering of the
Securities pursuant to this Agreement or (ii) if the allocation provided by
clause (i) is not permitted by applicable law, in such proportion as is
appropriate to reflect not only the relative benefits referred to in clause (i)
above but also the relative fault of the Company on the one hand and of the U.S.
Underwriters on the other hand in connection with the statements or omissions,
or in connection with any violation of the nature referred to in Section
6(a)(ii)(A) hereof, which resulted in such losses, liabilities, claims, damages
or expenses, as well as any other relevant equitable considerations.

                                       25
<PAGE>
 
      The relative benefits received by the Company on the one hand and the U.S.
Underwriters on the other hand in connection with the offering of the U.S.
Securities pursuant to this Agreement shall be deemed to be in the same
respective proportions as the total net proceeds from the offering of the U.S.
Securities pursuant to this Agreement (before deducting expenses) received by
the Company and the total underwriting discount received by the U.S.
Underwriters, in each case as set forth on the cover of the U.S. Prospectus, or,
if Rule 434 is used, the corresponding location on the Term Sheet, bear to the
aggregate initial public offering price of the U.S. Securities as set forth on
such cover.

      The relative fault of the Company on the one hand and the U.S.
Underwriters on the other hand shall be determined by reference to, among other
things, whether any such untrue or alleged untrue statement of a material fact
or omission or alleged omission to state a material fact relates to information
supplied by the Company or by the U.S. Underwriters and the parties' relative
intent, knowledge, access to information and opportunity to correct or prevent
such statement or omission or any violation of the nature referred to in Section
6(a)(ii)(A) hereof.

      The Company and the U.S. Underwriters agree that it would not be just and
equitable if contribution pursuant to this Section 7 were determined by pro rata
allocation (even if the U.S. Underwriters were treated as one entity for such
purpose) or by any other method of allocation which does not take account of the
equitable considerations referred to above in this Section 7. The aggregate
amount of losses, liabilities, claims, damages and expenses incurred by an
indemnified party and referred to above in this Section 7 shall be deemed to
include any legal or other expenses reasonably incurred by such indemnified
party in investigating, preparing or defending against any litigation, or any
investigation or proceeding by any governmental agency or body, commenced or
threatened, or any claim whatsoever based upon any such untrue or alleged untrue
statement or omission or alleged omission.

      Notwithstanding the provisions of this Section 7, no U.S. Underwriter
shall be required to contribute any amount in excess of the amount by which the
total price at which the U.S. Securities underwritten by it and distributed to
the public were offered to the public exceeds the amount of any damages which
such U.S. Underwriter has otherwise been required to pay by reason of any such
untrue or alleged untrue statement or omission or alleged omission.

      No person guilty of fraudulent misrepresentation (within the meaning of
Section 11(f) of the 1933 Act) shall be entitled to contribution from any person
who was not guilty of such fraudulent misrepresentation.

      For purposes of this Section 7, each person, if any, who controls a U.S.
Underwriter within the meaning of Section 15 of the 1933 Act or Section 20 of
the 1934 Act shall have the same rights to contribution as such U.S.
Underwriter, and each director of the Company, each officer of the Company who
signed the Registration Statement, and each person, if any, who controls the
Company within the meaning of Section 15 of the 1933 Act or Section 20 of the
1934 Act shall have the same rights to contribution as the Company. The U.S.
Underwriters'

                                       26
<PAGE>
 
respective obligations to contribute pursuant to this Section 7 are several in
proportion to the number of Initial U.S. Securities set forth opposite their
respective names in Schedule A hereto and not joint.

      SECTION 8. Representations, Warranties and Agreements to Survive Delivery.
                 --------------------------------------------------------------
All representations, warranties and agreements contained in this Agreement or in
certificates of officers of the Company or any of its subsidiaries submitted
pursuant hereto, shall remain operative and in full force and effect, regardless
of any investigation made by or on behalf of any U.S. Underwriter or controlling
person, or by or on behalf of the Company, and shall survive delivery of the
Securities to the U.S. Underwriters.

      SECTION 9.   Termination of Agreement.
                   ------------------------

      (a) Termination; General. The U.S. Representatives may terminate this
Agreement, by notice to the Company, at any time at or prior to Closing Time (i)
if there has been, since the time of execution of this Agreement or since the
respective dates as of which information is given in the U.S. Prospectus, any
material adverse change in the condition, financial or otherwise, or in the
earnings, business affairs or business prospects of the Company and its
subsidiaries considered as one enterprise, whether or not arising in the
ordinary course of business, or (ii) if there has occurred any material adverse
change in the financial markets in the United States or the international
financial markets, any outbreak of hostilities or escalation thereof or other
calamity or crisis or any change or development involving a prospective change
in national or international political, financial or economic conditions, in
each case the effect of which is such as to make it, in the judgment of the U.S.
Representatives, impracticable to market the Securities or to enforce contracts
for the sale of the Securities, or (iii) if trading in any securities of the
Company has been suspended or materially limited by the Commission or the New
York Stock Exchange, or if trading generally on the American Stock Exchange or
the New York Stock Exchange or in the Nasdaq National Market has been suspended
or materially limited, or minimum or maximum prices for trading have been fixed,
or maximum ranges for prices have been required, by any of said exchanges or by
such system or by order of the Commission, the National Association of
Securities Dealers, Inc. or any other governmental authority, or (iv) if a
banking moratorium has been declared by either Federal or New York authorities.

      (b) Liabilities. If this Agreement is terminated pursuant to this Section,
such termination shall be without liability of any party to any other party
except as provided in Section 4 hereof, and provided further that Sections 1, 6,
7 and 8 shall survive such termination and remain in full force and effect.

      SECTION 10. Default by One or More of the U.S. Underwriters. If one or
                  -----------------------------------------------
more of the U.S. Underwriters shall fail at Closing Time or a Date of Delivery
to purchase the Securities which it or they are obligated to purchase under this
Agreement (the "Defaulted Securities"), the U.S. Representatives shall have the
right, within 24 hours thereafter, to make arrangements for one or more of the
non-defaulting U.S. Underwriters, or any other underwriters, to purchase all,

                                       27
<PAGE>
 
but not less than all, of the Defaulted Securities in such amounts as may be
agreed upon and upon the terms herein set forth; if, however, the U.S.
Representatives shall not have completed such arrangements within such 24-hour
period, then:

                  (a) if the number of Defaulted Securities does not exceed 10%
      of the number of U.S. Securities to be purchased on such date, each of the
      non-defaulting U.S. Underwriters shall be obligated, severally and not
      jointly, to purchase the full amount thereof in the proportions that their
      respective underwriting obligations hereunder bear to the underwriting
      obligations of all non-defaulting U.S. Underwriters, or

                  (b) if the number of Defaulted Securities exceeds 10% of the
      number of U.S. Securities to be purchased on such date, this Agreement or,
      with respect to any Date of Delivery which occurs after the Closing Time,
      the obligation of the U.S. Underwriters to purchase and of the Company to
      sell the Option Securities to be purchased and sold on such Date of
      Delivery shall terminate without liability on the part of any
      non-defaulting U.S. Underwriter.

      No action taken pursuant to this Section shall relieve any defaulting U.S.
Underwriter from liability in respect of its default.

      In the event of any such default which does not result in a termination of
this Agreement or, in the case of a Date of Delivery which is after the Closing
Time, which does not result in a termination of the obligation of the U.S.
Underwriters to purchase and the Company to sell the relevant U.S. Option
Securities, as the case may be, either the U.S. Representatives or the Company
shall have the right to postpone Closing Time or the relevant Date of Delivery,
as the case may be, for a period not exceeding seven days in order to effect any
required changes in the Registration Statement or Prospectus or in any other
documents or arrangements. As used herein, the term "U.S. Underwriter" includes
any person substituted for a U.S. Underwriter under this Section 10.

      SECTION 11. Notices. All notices and other communications hereunder shall
                  -------
be in writing and shall be deemed to have been duly given if mailed or
transmitted by any standard form of telecommunication. Notices to the U.S.
Underwriters shall be directed to the U.S. Representatives at North Tower, World
Financial Center, New York, New York 10281-1201, attention of Robert A.
Simensky; and notices to the Company shall be directed to it at Four Greenwich
Office Park, Greenwich, Connecticut 06830, attention of Bradley S. Jacobs, with
copies to Oscar D. Folger, 321 Fifth Avenue, 24th Floor, New York, New York
10281 and Joseph Ehrenreich, Ehrenreich Eilenberg Krause & Zivian LLP, 11 East
44th Street, New York, New York 10017.

      SECTION 12. Parties. This Agreement shall each inure to the benefit of and
                  -------
be binding upon the U.S. Underwriters and the Company and their respective
successors. Nothing expressed or mentioned in this Agreement is intended or
shall be construed to give any person, firm or

                                       28
<PAGE>
 
corporation, other than the U.S. Underwriters and the Company and their
respective successors and the controlling persons and officers and directors
referred to in Sections 6 and 7 and their heirs and legal representatives, any
legal or equitable right, remedy or claim under or in respect of this Agreement
or any provision herein contained. This Agreement and all conditions and
provisions hereof are intended to be for the sole and exclusive benefit of the
U.S. Underwriters and the Company and their respective successors, and said
controlling persons and officers and directors and their heirs and legal
representatives, and for the benefit of no other person, firm or corporation. No
purchaser of Securities from any U.S. Underwriter shall be deemed to be a
successor by reason merely of such purchase.

      SECTION 13. GOVERNING LAW AND TIME. THIS AGREEMENT SHALL BE GOVERNED BY
                  ----------------------
AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK. SPECIFIED
TIMES OF DAY REFER TO NEW YORK CITY TIME.

      SECTION 14. Effect of Headings. The Article and Section headings herein
                  ------------------
and the Table of Contents are for convenience only and shall not affect the
construction hereof.

                                       29
<PAGE>
 
      If the foregoing is in accordance with your understanding of our
agreement, please sign and return to the Company a counterpart hereof, whereupon
this instrument, along with all counterparts, will become a binding agreement
between the U.S. Underwriters and the Company in accordance with its terms.

                                Very truly yours,

                              UNITED RENTALS, INC.

                                          By_________________________
                                             Name:
                                             Title:

 CONFIRMED AND ACCEPTED, 
    as of the date first above written:

MERRILL LYNCH & CO.
MERRILL LYNCH, PIERCE, FENNER & SMITH
        INCORPORATED
DONALDSON, LUFKIN & JENRETTE SECURITIES CORPORATION
DEUTSCHE MORGAN GRENFELL INC.

BY: MERRILL LYNCH, PIERCE, FENNER & SMITH
        INCORPORATED

By________________________________
      Authorized Signatory

For themselves and as U.S. Representatives of the
other U.S. Underwriters named in Schedule A hereto.

                                       30
<PAGE>
 
                                  SCHEDULE A

                                                                     Number of
                                                                      Initial
            Name of Underwriter                                     Securities
            -------------------                                     ----------

      Merrill Lynch, Pierce, Fenner & Smith
                     Incorporated............................

      Donaldson, Lufkin & Jenrette Securities Corporation.....
      Deutsche Morgan Grenfell Inc............................

      Total ......................................................   5,600,000
                                                                   ===========




                                    Sch A-1
<PAGE>
 
                                  SCHEDULE B

                             United Rentals, Inc.
                       5,600,000 Shares of Common Stock

                          (Par Value $.01 Per Share)

            1. The initial public offering price per share for the Securities,
determined as provided in said Section 2, shall be $ .

            2. The purchase price per share for the Securities to be paid by the
several Underwriters shall be $ , being an amount equal to the initial public
offering price set forth above less $  per share; provided that the purchase
price per share for any Option Securities purchased upon the exercise of the
over-allotment option described in Section 2(b) shall be reduced by an amount
per share equal to any dividends or distributions declared by the Company and
payable on the Initial Securities but not payable on the Option Securities.



                                    Sch B-1
<PAGE>
 
                                  SCHEDULE C

                         List of persons and entities
                              subject to lock-up

Bradley S. Jacobs
Wayland R. Hicks
John N. Milne
Michael J. Nolan
Robert P. Miner
Sandra E. Welwood
Kurtis T. Barker
Daniel E. Imig
Joseph J. Kondrup, Jr.
Kai E. Nyby
Richard A. Volonino
Ronald M. DeFeo
Richard J. Heckmann
Gerald Tsai, Jr.
Joe Bloodworth
Bradley F. Garruth
William Leslie Doggett
Frank Erwin
Equus II Partnership




                                    Sch C-1
<PAGE>
 
                                                                   Exhibit A-1

                     FORM OF OPINION OF COMPANY'S COUNSEL
                          TO BE DELIVERED PURSUANT TO
                                 SECTION 5(b)

      As to various questions of fact material to our opinion, we have relied
upon the certificates of officers and upon certificates of public officials.
With regard to the due incorporation of corporations (other than the Company)
and the good standing of corporations (other than the Company), we have (subject
to the next sentence) relied entirely upon certificates of public officials.
With regard to the tax good standing of certain corporations (other than the
Company), we have relied solely upon a certificate of an officer of such
corporation to the effect that the corporation has filed the most recent annual
report required by the law of such jurisdiction and that all franchise taxes
required to be paid under such law have been paid. We have also examined such
corporate documents and records and other certificates, and have made such
investigations of law, as we have deemed necessary in order to render the
opinion hereinafter set forth. We have assumed the authenticity of all documents
submitted to us as originals, the genuineness of all signatures, the legal
capacity of natural persons and the conformity to the originals of all documents
submitted to us as copies. We have also assumed that all documents examined by
us have been duly and validly authorized, executed and delivered by each of the
parties thereto other than the Company.

            (i) The Company has been duly incorporated and is validly existing
      as a corporation in good standing under the laws of the State of Delaware.

            (ii) The Company has corporate power and authority to own, lease and
      operate its properties and to conduct its business as described in the
      Prospectus and to enter into and perform its obligations under the
      Purchase Agreement.

            (iii) The Company is duly qualified as a foreign corporation to
      transact business and is in good standing in each jurisdiction in which
      such qualification is required, whether by reason of the ownership or
      leasing of property or the conduct of business, except where the failure
      so to qualify or to be in good standing would not result in a Material
      Adverse Effect.

            (iv) The authorized, issued and outstanding capital stock of the
      Company is as set forth in the Prospectus under "Description of Capital
      Stock--General" (except for subsequent issuances, if any, pursuant to the
      Purchase Agreement or pursuant to reservations, agreements or employee
      benefit plans referred to in the Prospectus or pursuant to the exercise of
      convertible securities, warrants or options referred to in the
      Prospectus); the shares of issued and outstanding capital stock of the
      Company have been

                                    A-1-1
<PAGE>
 
      duly authorized and validly issued and are fully paid and non-assessable;
      and none of the outstanding shares of capital stock of the Company was
      issued in violation of any preemptive or other similar rights of any
      security holder of the Company arising by statute or the Company's
      certificate of incorporation or by-laws or, to the best of our knowledge,
      any other preemptive or other similar rights of any security holder of the
      Company.

            (v) The Securities have been duly authorized for issuance and sale
      to the Underwriters pursuant to the Purchase Agreement and, when issued
      and delivered by the Company pursuant to the Purchase Agreement against
      payment of the consideration set forth in the Purchase Agreement, will be
      validly issued and fully paid and non-assessable and no holder of the
      Securities is or will be subject to personal liability by reason of being
      such a holder.

            (vi) The issuance of the Securities is not subject to preemptive or
      other similar rights of any security holder of the Company arising by
      statute or the Company's certificate of incorporation or by-laws or, to
      the best of our knowledge, any other preemptive or other similar rights of
      any security holder of the Company.

            (vii) Each subsidiary has been duly incorporated and is validly
      existing as a corporation in good standing under the laws of the
      jurisdiction of its incorporation, has corporate power and authority to
      own, lease and operate its properties and to conduct its business as
      described in the Prospectus and is duly qualified as a foreign corporation
      to transact business and is in good standing in each jurisdiction in which
      such qualification is required, whether by reason of the ownership or
      leasing of property or the conduct of business, except where the failure
      so to qualify or to be in good standing would not result in a Material
      Adverse Effect; except as otherwise disclosed in the Registration
      Statement and other than as contemplated by the Credit Agreement of the
      Company filed as Exhibit 10(a) to the Registration Statement, all of the
      issued and outstanding capital stock of each subsidiary has been duly
      authorized and validly issued, is fully paid and non-assessable and, to
      the best of our knowledge, is owned by the Company, directly or through
      subsidiaries, free and clear of any security interest, mortgage, pledge,
      lien, encumbrance, claim or equity; none of the outstanding shares of
      capital stock of any subsidiary was issued in violation of the preemptive
      or similar rights of any security holder of such subsidiary.

            (viii) The Purchase Agreement has been duly authorized, executed and
      delivered by the Company.

            (ix) The Registration Statement, including any Rule 462(b)
      Registration Statement, has been declared effective under the 1933 Act;
      any required filing of the Prospectus pursuant to Rule 424(b) has been
      made in the manner and within the time period required by Rule 424(b);
      and, to the best of our knowledge, no stop order suspending the
      effectiveness of the Registration Statement or any Rule 462(b)
      Registration

                                    A-1-2
<PAGE>
 
      Statement has been issued under the 1933 Act and no proceedings for that
      purpose have been instituted or are pending or threatened by the
      Commission.

            (x) The Registration Statement, including any Rule 462(b)
      Registration Statement, the Rule 430A Information and the Rule 434
      Information, as applicable, the Prospectus and each amendment or
      supplement to the Registration Statement and Prospectus as of their
      respective effective or issue dates (other than the financial statements
      and supporting schedules included therein or omitted therefrom, as to
      which we need express no opinion) complied as to form in all material
      respects with the requirements of the 1933 Act and the 1933 Act
      Regulations.

            (xi) If Rule 434 has been relied upon, the Prospectus was not
      "materially different," as such term is used in Rule 434, from the
      prospectus included in the Registration Statement at the time it became
      effective.

            (xii) The form of certificate used to evidence the Common Stock
      complies in all material respects with all applicable statutory
      requirements, with any applicable requirements of the charter and by-laws
      of the Company and the requirements of the New York Stock Exchange.

            (xiii) To the best of our knowledge, there is not pending or
      threatened any action, suit, proceeding, inquiry or investigation, to
      which the Company or any subsidiary is a party, or to which the property
      of the Company or any subsidiary is subject, before or brought by any
      court or governmental agency or body, domestic or foreign, which might
      reasonably be expected to result in a Material Adverse Effect, or which
      might reasonably be expected to materially and adversely affect the
      properties or assets thereof or the consummation of the transactions
      contemplated in the Purchase Agreement or the performance by the Company
      of its obligations thereunder.

            (xiv) The information in the Prospectus under "Dividend Policy" and
      "Description of Capital Stock", "Certain Charter and By-Law Provisions",
      and in the Registration Statement under Item 14 and Item 15, insofar as
      they purport to constitute a summary of the terms of the Common Stock, the
      provisions of the Company's certificate of incorporation or By-laws or
      specific provisions of the Delaware General Corporation Law referred to
      therein, are accurate summaries in all material respects of such terms or
      provisions, as the case may be.

            (xv) To the best of our knowledge, neither the Company nor any
      subsidiary is in violation of its charter or by-laws.

            (xvi) To the best of our knowledge, neither the Company nor any
      subsidiary is in default in the due performance or observance of any
      material obligation, agreement, covenant or condition contained in any
      contract, indenture, mortgage, loan agreement,


                                    A-1-3
<PAGE>
 
      note, lease or other agreement or instrument that is described or referred
      to in the Registration Statement or the Prospectus or filed or
      incorporated by reference as an exhibit to the Registration Statement
      which violations or defaults are required to be described in the
      prospectus and are not so described or would, individually or in the
      aggregate, have a Material Adverse Effect or effect the validity of the
      Securities.

            (xvii) No filing with, or authorization, approval, consent, license,
      order, registration, qualification or decree of, any court or governmental
      authority or agency, domestic or foreign (other than under the 1933 Act
      and the 1933 Act Regulations and the 1934 Act and the 1934 Act
      Regulations, which have been obtained, or as may be required under the
      securities or blue sky laws of the various states, as to which we need
      express no opinion) is necessary or required in connection with the due
      authorization, execution and delivery of the Purchase Agreement or for the
      offering, issuance or sale of the Securities.

            (xviii) The execution, delivery and performance of the Purchase
      Agreement and the consummation of the transactions contemplated in the
      Purchase Agreement and in the Registration Statement (including the
      issuance and sale of the Securities and the use of a portion of the net
      proceeds from the sale of the Securities to repay outstanding indebtedness
      as described in the Prospectus under the caption "Use Of Proceeds") and
      compliance by the Company with its obligations under the Purchase
      Agreement (A) after reasonable investigation do not and will not, whether
      with or without the giving of notice or lapse of time or both, conflict
      with or constitute a breach of, or default or Repayment Event (as defined
      in Section 1(a)(x) of the Purchase Agreement) under or result in the
      creation or imposition of any lien, charge or encumbrance upon any
      property or assets of the Company or any subsidiary pursuant to any
      contract, indenture, mortgage, deed of trust, loan or credit agreement,
      note, lease or any other agreement or instrument, known to us, to which
      the Company or any subsidiary is a party or by which it or any of them may
      be bound, or to which any of the property or assets of the Company or any
      subsidiary is subject (except for such conflicts, breaches or defaults,
      Repayment Events or liens, charges or encumbrances that would not have a
      Material Adverse Effect), (B) result in any violation of the provisions of
      the charter or by-laws of the Company or any subsidiary, or (C) to the
      best of our knowledge, result in any violation of the provisions of any
      applicable law, statute, rule or regulation of the United States of
      America or included in the Delaware General Corporate Law (except we
      express no opinion as to "blue sky" laws), judgment, order, writ or
      decree, known to us, of any government, government instrumentality or
      court, domestic or foreign, having jurisdiction over the Company or any
      subsidiary or any of their respective properties, assets or operations.

            (xix) To the best of our knowledge, there are no persons with
      registration rights or other similar rights to have any securities
      registered pursuant to the Registration Statement.


                                    A-1-4
<PAGE>
 
            (xx) The Company is not an "investment company" or an entity
      "controlled" by an "investment company," as such terms are defined in the
      1940 Act.

            (xxi) We have reviewed the Prospectus and the Registration Statement
      and participated in discussions with your representatives and those of the
      Company, its accountants and its other counsel. Although we have not
      undertaken, except as otherwise indicated in this opinion, to investigate
      or verify independently, and do not assume responsibility for, the
      accuracy, completeness or fairness of the statements contained in the
      Registration Statement, on the basis of the information that we gained in
      the course of the performance of such services and our representation of
      the Company, we confirm to you that nothing that came to our attention in
      the course of such review or representation has caused us to belief that
      (i) the Registration Statement or any amendment thereto, including the
      Rule 430A Information and Rule 434 Information (if applicable), (except
      for financial statements and schedules and other financial data included
      therein or omitted therefrom, as to which we need make no statement), at
      the time such Registration Statement or any such amendment became
      effective, contained an untrue statement of a material fact or omitted to
      state a material fact required to be stated therein or necessary to make
      the statements therein not misleading or that the Prospectus or any
      amendment or supplement thereto (except for financial statements and
      schedules and other financial data included therein or omitted therefrom,
      as to which we need make no statement), at the time the Prospectus was
      issued, at the time any such amended or supplemented prospectus was issued
      or at the Closing Time, included or includes an untrue statement of a
      material fact or omitted or omits to state a material fact necessary in
      order to make the statements therein, in the light of the circumstances
      under which they were made, not misleading or (ii) that there are any
      franchises, contracts, indentures, mortgages, loan agreements, notes,
      leases or other instruments required to be described or referred to in the
      Registration Statement or to be filed as exhibits thereto other than those
      described or referred to therein or filed or incorporated by reference as
      exhibits thereto or that any descriptions of or references to any of the
      foregoing are not correct in all material respects.

            In rendering such opinion, such counsel may rely, as to matters of
fact (but not as to legal conclusions), to the extent they deem proper, on
certificates of responsible officers of the Company and public officials. Such
opinion shall not state that it is to be governed or qualified by, or that it is
otherwise subject to, any treatise, written policy or other document relating to
legal opinions, including, without limitation, the Legal Opinion Accord of the
ABA Section of Business Law (1991).


                                    A-1-5
<PAGE>
 
                                                                   Exhibit A-2

                         FORM OF OPINION OF COMPANY'S
                       COUNSEL TO BE DELIVERED PURSUANT
                               TO SECTION 5(b)

      (i) The Company is a corporation duly incorporated, validly existing and
in good standing under the laws of the State of Delaware, and has all requisite
corporate power and authority to own, lease and operate its properties and to
carry on its business as described in the Prospectuses and to enter into and
perform its obligations under the Purchase Agreements.

      (ii) The authorized, issued and outstanding capital stock of the Company
is as set forth in the Prospectuses under the caption entitled "Description of
Capital Stock-General" (except for subsequent issuances pursuant to the Purchase
Agreements or pursuant to reservations, agreements, rights, or stock option or
employee benefit plans referred to in the Prospectuses, or pursuant to the
exercise of convertible securities, warrants, rights or options referred to in
the Prospectuses, or pursuant to an adjustment to the amount of the Stock
Consideration (as defined in the Prospectuses)). All of the issued and
outstanding shares of capital stock of the Company have been duly authorized and
validly issued and are fully paid and nonassessable; and none of the outstanding
shares of capital stock of the Company were issued in violation of preemptive
rights pursuant to law or in the Company's certificate of incorporation or
by-laws.

      (iii) The Securities have been duly authorized and, when issued and
delivered as contemplated by the Purchase Agreements against payment of the
consideration therefor set forth in the Purchase Agreements, will be validly
issued, fully paid and nonassessable and free of preemptive rights pursuant to
law or in the Company's certificate of incorporation or by laws, and no holder
of the Securities is or will be subject to personal liability solely by reason
of being such a holder.

      (iv) The execution, delivery and performance of the Purchase Agreements by
the Company have been duly authorized by all necessary corporate action on the
part of the Company. The Purchase Agreements have been duly and validly executed
and delivered by the Company.

      (v) We have been informed that the Registration Statement was declared
effective under the 1933 Act as of __:__ _ . m. on December __, 1997, and to our
knowledge, as of 10:00 a.m. on the date hereof, no stop order suspending the
effectiveness of the Registration Statement has been issued under the 1933 Act
and, to our knowledge, no proceedings for that purpose have been instituted or
are pending or threatened by the Commission. The Prospectuses have been filed
with the Commission pursuant to Rule 424(b) under the 1933 Act.

      (vi) The Registration Statement and the Prospectuses (except for the
financial statements and the notes thereto and the other financial, statistical
and accounting data included in the Registration Statement or the Prospectuses,
as to which we express no opinion) comply as to
<PAGE>
 
form in all material respects with the requirements of the 1933 Act and the
rules and regulations thereunder.

      (vii) The statements contained in the Prospectuses under the captions
"Dividend Policy," "Description of Capital Stock," "Certain Charter and By-Law
Provisions" and "Certain United States Federal Tax Considerations," and in Part
II of the Registration Statement under Item 14 and Item 15, insofar as they
purport to describe the provisions of the documents referred to therein or
matters of federal or Delaware corporate law, constitute a fair summary thereof
in material respects; and all descriptions in the Registration Statement of
contracts or agreements to which the Company or any of its subsidiaries is a
party are accurate in all material respects.

      (viii) No consent, approval, waiver, license or authorization or other
action by or filing with any New York, Delaware corporate or federal
governmental authority is required in connection with the execution and delivery
by the Company of the Purchase Agreements or the consummation by the Company of
the transactions contemplated thereby, except for filings and other actions
required under or pursuant to (i) the 1933 Act and the rules and regulations
promulgated thereunder, which have been made or obtained, and (ii) the 1934 Act
and the rules and regulations promulgated thereunder, any other federal or state
securities or "blue sky" laws, and the rules of the New York Stock Exchange, as
to which we express no opinion.

      (ix) The Company is not an "investment company" or an entity "controlled"
by an investment company", as such terms are defined in the 1940 Act.

      (x) To our knowledge, there are no persons with registrations rights or
other similar rights to have any securities registered pursuant to the
Registration Statement.

      (xi) We have participated in conferences with directors, officers and
other representatives of the Company, representatives of the independent public
accountants for the Company, representatives of the Underwriters and
representatives of counsel for the Underwriters, at which conferences the
contents of the Registration Statement and the Prospectuses and related matters
were discussed, and, although we have not independently verified and are not
passing upon and assume no responsibility for the accuracy, completeness or
fairness of the statements contained in the Registration Statement and
Prospectuses (except to the extent specified in the foregoing opinions), no
facts have come to our attention which lead us to believe that the Registration
Statement, on the effective date thereof, contained an untrue statement of a
material fact or omitted to state a material fact required to be stated therein
or necessary to make the statements contained therein not misleading or that the
Prospectuses, on the date thereof or on the date hereof, contained or contain an
untrue statement of a material fact or omitted or omits to state a material fact
required to be stated therein or necessary to make the statements contained
therein, in light of the circumstances under which they were made, not
misleading (it being understood that we express no view with respect to the
financial statements and related notes, the financial statement schedules and

                                    A-2-2
<PAGE>
 
the other financial, statistical and accounting data included in the
Registration Statement or Prospectuses).

            In rendering such opinion, such counsel may rely, as to matters of
fact (but not as to legal conclusions), to the extent they deem proper, on
certificates of responsible officers of the Company and public officials. Such
opinion shall not state that it is to be governed or qualified by, or that it is
otherwise subject to, any treatise, written policy or other document relating to
legal opinions, including, without limitation, the Legal Opinion Accord of the
ABA Section of Business Law (1991).

                                    A-2-3
<PAGE>
 
        FORM OF LOCK-UP FROM DIRECTORS, OFFICERS AND OTHER STOCKHOLDERS
                            PURSUANT TO SECTION 5(i)

                                                                     Exhibit B

                               December  , 1997

MERRILL LYNCH & CO.
Merrill Lynch, Pierce, Fenner & Smith
             Incorporated,
Donaldson, Lufkin & Jenrette Securities Corporation, and
Deutsche Morgan Grenfell Inc.,
   as Representatives of the several
   Underwriters to be named in the
   within-mentioned Purchase Agreement
c/o  Merrill Lynch & Co.
Merrill Lynch, Pierce, Fenner & Smith
             Incorporated
North Tower
World Financial Center
New York, New York  10281-1209

                  Re:   Proposed Initial Public Offering by United Rentals, Inc.
                        -------------------------------------------------------

Ladies and Gentlemen:

      The undersigned, a stockholder and an officer and/or director of United
Rentals, Inc., a Delaware corporation (the "Company"), understands that Merrill
Lynch & Co., Merrill Lynch, Pierce, Fenner & Smith Incorporated ("Merrill
Lynch"), Donaldson, Lufkin & Jenrette Securities Corporation, and Deutsche
Morgan Grenfell Inc. propose to enter into a Purchase Agreement (the "Purchase
Agreement") with the Company providing for the public offering of shares (the
"Securities") of the Company's common stock, par value $.01 per share (the
"Common Stock"). In recognition of the benefit that such an offering will confer
upon the undersigned as a stockholder and an officer and/or director of the
Company, and for other good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged, the undersigned agrees with each
underwriter to be named in the Purchase Agreement that, during a period of 180
days from the date of the Purchase Agreement, the undersigned will not, without
the prior written consent of Merrill Lynch on behalf of the Underwriters named
in the Purchase Agreement, directly or indirectly, (i) offer, pledge, sell,
contract to sell, sell any option or contract to purchase, purchase any option
or contract to sell, grant any option, right or warrant for the sale of, or
otherwise dispose of or transfer any shares of the Company's Common Stock or any
securities convertible into or exchangeable or exercisable for Common Stock,
whether now owned or hereafter acquired by the undersigned or with respect to
which the undersigned has or hereafter acquires the power of disposition, or
file any registration statement under the Securities Act of

                                     B-1
<PAGE>
 
1933, as amended, with respect to any of the foregoing or (ii) enter into any
swap or any other agreement or any transaction that transfers, in whole or in
part, directly or indirectly, the economic consequence of ownership of the
Common Stock, whether any such swap transaction is to be settled by delivery of
Common Stock or other securities, in cash or otherwise.

      Nothing contained herein limits the ability of the undersigned (i) to
transfer shares of Common Stock in a private placement pursuant to an exemption
from the registration requirements of the 1933 Act or (ii) to pledge shares of
Common Stock as security of indebtedness, provided, however, in either case the
transferee or pledgee agrees to be bound by the limitations contained herein.

                                    Very truly yours,

                                    Signature:
                                    Print Name:






                                     B-2
<PAGE>
 
                                                                       Annex A

         FORM OF ACCOUNTANTS' COMFORT LETTER PURSUANT TO SECTION 5(e)

            We are independent public accountants with respect to the Company
within the meaning of the 1933 Act and the applicable published 1933 Act
Regulations

            (i) in our opinion, the audited financial statements and the related
      financial statement schedules included in the Registration Statement and
      the Prospectus comply as to form in all material respects with the
      applicable accounting requirements of the 1933 Act and the published rules
      and regulations thereunder;

            (ii) on the basis of procedures (but not an examination in
      accordance with generally accepted auditing standards) consisting of a
      reading of the unaudited interim financial statements of the Company for
      the period ended September 30, 1997, included in the Registration
      Statement and the Prospectus (collectively, the "Quarterly Financials"), a
      reading of the minutes of all meetings of the stockholders and directors
      of the Company and its subsidiaries and the Audit and Compensation
      Committees of the Company's Board of Directors and any subsidiary
      committees since October 1, 1997, inquiries of certain officials of the
      Company and its subsidiaries responsible for financial and accounting
      matters, a review of interim financial information in accordance with
      standards established by the American Institute of Certified Public
      Accountants in Statement on Auditing Standards No. 71, Interim Financial
      Information ("SAS 71"), with respect to the period ended September 30,
      1997 and such other inquiries and procedures as may be specified in such
      letter, nothing came to our attention that caused us to believe that:

            (A) the Quarterly Financials included in the Registration Statement
            and the Prospectus do not comply as to form in all material respects
            with the applicable accounting requirements of the 1933 Act and the
            1933 Act Regulations or any material modifications should be made to
            the financial statements included in the Registration Statement and
            the Prospectus for them to be in conformity with generally accepted
            accounting principles; or

            (B ) at September 30, 1997 and at a specified date not more than
            five days prior to the date of this Agreement, there was any change
            in the [cash and cash equivalents, net rental equipment, total
            assets, debt or stockholders' equity] of the Company and its
            subsidiaries or any decrease in the [cash and cash equivalents, net
            rental equipment or total assets] of the Company and its
            subsidiaries or any increase in the [debt or stockholders' equity]
            of the Company and its subsidiaries, in each case as compared with
            amounts shown in the latest balance sheet included in the
            Registration Statement, except in each case for changes, decreases
            or increases that the Registration Statement discloses have occurred
            or may occur;

                                  Annex A-1
<PAGE>
 
            (iii) based upon the procedures set forth in clause (ii) above and a
      reading of the Selected Historical and Pro Forma Consolidated Financial
      Information included in the Registration Statement and a reading of the
      financial statements from which such data were derived, nothing came to
      our attention that caused us to believe that the Selected Historical and
      Pro Forma Consolidated Financial Information included in the Registration
      Statement do not comply as to form in all material respects with the
      disclosure requirements of Item 301 of Regulation S-K of the 1933 Act ,
      that the amounts included in the Selected Historical and Pro Forma
      Consolidated Financial Information are not in agreement with the
      corresponding amounts in the audited financial statements for the
      respective periods or that the financial statements not included in the
      Registration Statement from which certain of such data were derived are
      not in conformity with generally accepted accounting principles;

            (iv) we have compared the information in the Registration Statement
      under selected captions with the disclosure requirements of Regulation S-K
      of the 1933 Act and on the basis of limited procedures specified herein.
      nothing came to our attention that caused us to believe that this
      information does not comply as to form in all material respects with the
      disclosure requirements of Items 302, 402 and 503(d), respectively, of
      Regulation S-K;

            (v) based upon the procedures set forth in clause (ii) above, a
      reading of the unaudited financial statements of the Company for the most
      recent period that have not been included in the Registration Statement
      and a review of such financial statements in accordance with SAS 71,
      nothing came to our attention that caused us to believe that the unaudited
      amounts for [total revenues, total cost of operations, operating income
      (loss), income (loss) before income taxes, net income (loss) or earnings
      (loss) per share] for the most recent period do not agree with the amounts
      set forth in the unaudited consolidated financial statements for those
      periods or that such unaudited amounts were not determined on a basis
      substantially consistent with that of the corresponding amounts in the
      audited financial statements;

            (vi) we are unable to and do not express any opinion on the pro
      forma financial information (the "Pro Forma Statements") included in the
      Registration Statement or on the pro forma adjustments applied to the
      historical amounts included in the Pro Forma Statement; however, for
      purposes of this letter we have:

                  (A)   read the Pro Forma Statements;

                  (B) performed an audit of the financial statements to which
            the pro forma adjustments were applied;

                                  Annex A-2
<PAGE>
 
                  (C) made inquiries of certain officials of the Company who
            have responsibility for financial and accounting matters about the
            basis for their determination of the pro forma adjustments and
            whether the Pro Forma Statements complies as to form in all material
            respects with the applicable accounting requirements of Rule 11-02
            of Regulation S-X; and

                  (D) proved the arithmetic accuracy of the application of the
            pro forma adjustments to the historical amounts in the Pro Forma
            Statements; and on the basis of such procedures and such other
            inquiries and procedures as specified herein, nothing came to our
            attention that caused us to believe that the Pro Forma Statements
            included in the Registration Statement do not comply as to form in
            all material respects with the applicable requirements of Rule 11-02
            of Regulation S-X or that the pro forma adjustments have not been
            properly applied to the historical amounts in the compilation of
            those statements; and

            (vii) in addition to the procedures referred to in clause (ii)
      above, we have performed other procedures, not constituting an audit, with
      respect to certain amounts, percentages, numerical data and financial
      information appearing in the Registration Statement, which are specified
      herein, and have compared certain of such items with, and have found such
      items to be in agreement with, the accounting and financial records of the
      Company.

                                  Annex A-3

<PAGE>
 
                                                                    EXHIBIT 1(b)
==============================================================================







                             United Rentals, Inc.

                           (A Delaware Corporation)

                       1,400,000  Shares of Common Stock

                       INTERNATIONAL PURCHASE AGREEMENT




Dated:  December  , 1997



================================================================================
<PAGE>
 
                               TABLE OF CONTENTS                          PAGE

SECTION 1.  Representations and Warranties...................................4

      (a)  Representations and Warranties by the Company.....................4
            (i)  Compliance with Registration Requirements...................4

            (ii)  Independent Accountants....................................5

            (iii)  Financial Statements......................................5

            (iv)  No Material Adverse Change in Business.....................5

            (v)  Good Standing of the Company................................6

            (vi)  Good Standing of Subsidiaries..............................6

            (vii)  Capitalization............................................6

            (viii)  Authorization of Agreement...............................7

            (ix)  Authorization and Description of Securities................7

            (x)  Absence of Defaults and Conflicts...........................7

            (xi)  Absence of Labor Dispute...................................8

            (xii)  Absence of Proceedings....................................8

            (xiii)  Accuracy of Exhibits.....................................8

            (xiv)  Possession of Intellectual Property.......................8

            (xv)  Absence of Further Requirements............................9

            (xvi)  Possession of Licenses and Permits........................9

            (xvii)  Title to Property........................................9

            (xviii)  Compliance with Cuba Act...............................10

            (xix)  Investment Company Act...................................10

            (xx)  Environmental Laws........................................10

      (b)   Officer's Certificates..........................................12

SECTION 2.  Sale and Delivery to International Managers; Closing............12

      (a)   Initial Securities..............................................12
      (b)   Option Securities...............................................12
      (c)   Payment.........................................................13
      (d)   Denominations; Registration.....................................13

SECTION 3.  Covenants of the Company........................................14

      (a)   Compliance with Securities Regulations and Commission Requests..14

                                      i
<PAGE>
 
      (b)   Filing of Amendments............................................14
      (c)   Delivery of Registration Statements.............................14
      (d)   Delivery of Prospectuses........................................15
      (e)   Continued Compliance with Securities Laws.......................15
      (f)   Blue Sky Qualifications.........................................15
      (g)   Rule 158........................................................16
      (h)   Use of Proceeds.................................................16
      (i)   Listing.........................................................16
      (j)   Restriction on Sale of Securities...............................16
      (k)   Reporting Requirements..........................................17
      (l)   Compliance with NASD Rules......................................17
      (m)   Compliance with Rule 463........................................17

SECTION 4.  Payment of Expenses.............................................17

      (a)  Expenses.........................................................17
      (b)  Termination of Agreement.........................................18

SECTION 5.  Conditions of International Managers' Obligations...............18

      (a)   Effectiveness of Registration Statement.........................18
      (b)   Opinions of Counsel for Company.................................18
      (c)   Opinion of Counsel for International Managers...................18
      (d)   Officers' Certificate...........................................19
      (e)   Accountant's Comfort Letter.....................................19
      (f)   Bring-down Comfort Letter.......................................19
      (g)   Approval of Listing.............................................19
      (i)   Lock-up Agreements..............................................20
      (j)   Purchase of Initial U.S. Securities.............................20
      (k)   Conditions to Purchase of International Option Securities.......20
            (i)  Officers' Certificate......................................20

            (ii)  Opinions of Counsel for Company...........................20

            (iii)  Opinion of Counsel for International Managers............20

            (iv)  Bring-down Comfort Letter.................................20

      (l)   Additional Documents............................................21
      (m)   Termination of Agreement........................................21

                                      ii
<PAGE>
 
SECTION 6.  Indemnification.................................................21

      (a)   Indemnification of International Managers.......................21
      (b)   Indemnification of Company, Directors and Officers..............22
      (c)   Actions against Parties; Notification...........................23
      (d)   Settlement without Consent if Failure to Reimburse..............23
      (e)   Indemnification for Reserved Securities.........................24

SECTION 7.  Contribution....................................................24


SECTION 8.  Representations, Warranties and Agreements to Survive Delivery..25


SECTION 9.  Termination of Agreement........................................25

      (a)   Termination; General............................................25
      (b)   Liabilities.....................................................26

SECTION 10.  Default by One or More of the International Managers...........26


SECTION 11.  Notices........................................................27


SECTION 12.  Parties........................................................27


SECTION 13.  GOVERNING LAW AND TIME.........................................27


SECTION 14.  Effect of Headings.............................................27


SCHEDULES

      Schedule A                                Sch A-1
      Schedule B                                Sch B-1
      Schedule C                                Sch C-1

EXHIBITS

      Exhibit A-1  - Form of Opinion of Company's Counsel           A-1

                                     iii
<PAGE>
 
      Exhibit A-1  - Form of Opinion of Company's Counsel           A-1
      Exhibit B - Form of Lock-up Letter                            B-1

ANNEX
      Annex A - Form of Accountants' Comfort Letter
      Pursuant to Section 5(e)                                Annex A-1

                                      iv
<PAGE>
 
                             United Rentals, Inc.

                           (a Delaware corporation)

                       1,400,000 Shares of Common Stock

                          (Par Value $.01 Per Share)

                       INTERNATIONAL PURCHASE AGREEMENT

                                        December  , 1997

MERRILL LYNCH INTERNATIONAL
Donaldson, Lufkin & Jenrette International
Morgan Grenfell & Co. Limited
  as Lead Managers for the several International Managers
c/o  Merrill Lynch International
Ropemaker Place
25 Ropemaker Street
London EC2Y 9LY
England

Ladies and Gentlemen:

      United Rentals, Inc., a Delaware corporation (the "Company"), confirms its
agreement with Merrill Lynch International ("Merrill Lynch") and each of the
other international underwrit ers named in Schedule A hereto (collectively, the
"International Managers", which term shall also include any underwriter
substituted as hereinafter provided in Section 10 hereof), for whom Merrill
Lynch, Donaldson, Lufkin & Jenrette International and Morgan Grenfell & Co.
Limited are acting as representatives (in such capacity, the "Lead Managers"),
with respect to the issue

                                       1
<PAGE>
 
and sale by the Company and the purchase by the International Managers, acting
severally and not jointly, of the respective numbers of shares of Common Stock,
par value $.01 per share, of the Company ("Common Stock") set forth in said
Schedule A, and with respect to the grant by the Company to the International
Managers, acting severally and not jointly, of the option described in Section
2(b) hereof to purchase all or any part of 210,000 additional shares of Common
Stock to cover over-allotments, if any. The aforesaid 1,400,000 shares of Common
Stock (the "Initial International Securities") to be purchased by the
International Managers and all or any part of the 210,000 shares of Common Stock
subject to the option described in Section 2(b) hereof (the "International
Option Securities") are hereinafter called, collectively, the "International
Securities".

      It is understood that the Company is concurrently entering into an
agreement dated the date hereof (the "U.S. Purchase Agreement") providing for
the offering by the Company of an aggregate of 5,600,000 shares of Common Stock
(the "Initial U.S. Securities") through arrange ments with certain underwriters
in the United States and Canada (the "U.S. Underwriters") for which Merrill
Lynch & Co., Merrill Lynch, Pierce, Fenner & Smith Incorporated, Donaldson,
Lufkin & Jenrette Securities Corporation and Deutsche Morgan Grenfell Inc. are
acting as representatives (the "U.S. Representatives") and the grant by the
Company to the U.S. Under writers, acting severally and not jointly, of an
option to purchase all or any part of the 840,000 additional shares of Common
Stock solely to cover over-allotments, if any (the "U.S. Option Securities" and,
together with the International Option Securities, the "Option Securities"). The
Initial U.S. Securities and the U.S. Option Securities are hereinafter called
the "U.S. Securities". It is understood that the Company is not obligated to
sell and the International Managers are not obligated to purchase, any Initial
International Securities unless all of the Initial U.S. Securities are
contemporaneously purchased by the U.S. Underwriters.

      The International Managers and the U.S. Underwriters are hereinafter
collectively called the "Underwriters", the Initial International Securities and
the Initial U.S. Securities are hereinaf ter collectively called the "Initial
Securities". The International Securities, and the U.S. Securities are
hereinafter collectively called the "Securities".

      The Underwriters will concurrently enter into an Intersyndicate Agreement
of even date herewith (the "Intersyndicate Agreement") providing for the
coordination of certain transactions among the Underwriters under the direction
of Merrill Lynch & Co., Merrill Lynch, Pierce, Fenner & Smith Incorporated (in
such capacity, the "Global Coordinator").

                                       2
<PAGE>
 
      The Company understands that the International Managers propose to make a
public offering of the International Securities as soon as the Lead Managers
deem advisable after this Agreement has been executed and delivered.

      The Company and the International Managers agree that up to 700,000 shares
of the Initial U.S. Securities to be purchased by the U.S. Underwriters (the
"Reserved Securities") shall be reserved for sale by the Underwriters to certain
employees, directors, and business associates of, and certain other persons
designated by, the Company, as part of the distribution of the Securities by the
Underwriters, subject to the terms of this Agreement, the applicable rules,
regulations and interpretations of the National Association of Securities
Dealers, Inc. (the "NASD") and all other applicable laws, rules and regulations.
To the extent that such Reserved Securities are not orally confirmed for
purchase by such employees, directors, and business associates of, and certain
other persons designated by, the Company by the end of the first business day
after the date of this Agreement, such Reserved Securities will be offered to
the public as part of the public offering contemplated hereby.

      The Company has filed with the Securities and Exchange Commission (the
"Commis sion") a registration statement on Form S-1 (No. 333-39117) covering the
registration of the Securities under the Securities Act of 1933, as amended (the
"1933 Act"), including the related preliminary prospectus or prospectuses.
Promptly after execution and delivery of this Agreement, the Company will either
(i) prepare and file a prospectus in accordance with the provisions of Rule 430A
("Rule 430A") of the rules and regulations of the Commission under the 1933 Act
(the "1933 Act Regulations") and paragraph (b) of Rule 424 ("Rule 424(b)") of
the 1933 Act Regulations or (ii) if the Company has elected to rely upon Rule
434 ("Rule 434") of the 1933 Act Regulations, prepare and file a term sheet (a
"Term Sheet") in accordance with the provi sions of Rule 434 and Rule 424(b).
Two forms of prospectus are to be used in connection with the offering and sale
of the Securities: one relating to the International Securities (the "Form of
International Prospectus") and one relating to the U.S. Securities (the "Form of
U.S. Prospec tus"). The Form of International Prospectus is identical to the
Form of U.S. Prospectus, except for the front cover and back cover pages and the
information under the caption "Underwriting." The information included in any
such prospectus or in any such Term Sheet, as the case may be, that was omitted
from such registration statement at the time it became effective but that is
deemed to be part of such registration statement at the time it became effective
(a) pursuant to paragraph (b) of Rule 430A is referred to as "Rule 430A
Information" or (b) pursuant to paragraph (d) of Rule 434 is referred to as
"Rule 434 Information." Each Form of International Prospectus and Form of U.S.
Prospectus used before such registration statement became effective, and any
prospectus that omitted, as applicable, the Rule 430A Information or the Rule
434 Information, that was used after such effectiveness and prior to the
execution and delivery of

                                       3
<PAGE>
 
this Agreement, is herein called a "preliminary prospectus." Such registration
statement, including the exhibits thereto and schedules thereto at the time it
became effective and including the Rule 430A Information and the Rule 434
Information, as applicable, is herein called the "Registration Statement." Any
registration statement filed pursuant to Rule 462(b) of the 1933 Act Regulations
is herein referred to as the "Rule 462(b) Registration Statement," and after
such filing the term "Registration Statement" shall include the Rule 462(b)
Registration Statement. The final Form of International Prospectus and the final
Form of U.S. Prospectus in the forms first furnished to the Underwriters for use
in connection with the offering of the Securities are herein called the
"International Prospectus" and the "U.S. Prospectus," respectively, and
collectively, the "Prospectuses." If Rule 434 is relied on, the terms
"International Prospectus" and "U.S. Prospectus" shall refer to the preliminary
International Prospectus dated December 3, 1997 and preliminary U.S. Prospectus
dated December 3, 1997, respectively, each together with the applicable Term
Sheet and all references in this Agreement to the date of such Prospectuses
shall mean the date of the applicable Term Sheet. For purposes of this
Agreement, all references to the Registration Statement, any preliminary
prospectus, the International Prospectus, the U.S. Prospectus or any Term Sheet
or any amendment or supplement to any of the foregoing shall be deemed to
include the copy filed with the Commission pursuant to its Electronic Data
Gathering, Analysis and Retrieval system ("EDGAR").

      SECTION 1.  Representations and Warranties.
                  ------------------------------
      (a) Representations and Warranties by the Company. The Company represents
and warrants to each International Manager as of the date hereof (and agrees
that each such representation and warranty will be deemed to be made by the
Company as of the Closing Time referred to in Section 2(c) hereof, and as of
each Date of Delivery (if any) referred to in Section 2(b) hereof) and agrees
with each International Manager, as follows:

            (i) Compliance with Registration Requirements. Each of the
                -----------------------------------------
      Registration Statement and any Rule 462(b) Registration Statement has
      become effective under the 1933 Act and no stop order suspending the
      effectiveness of the Registration Statement or any Rule 462(b)
      Registration Statement has been issued under the 1933 Act and no
      proceedings for that purpose have been instituted or are pending or, to
      the knowledge of the Company, are contemplated by the Commission, and any
      request on the part of the Commission for additional information has been
      complied with.

            At the respective times the Registration Statement, any Rule 462(b)
      Registration Statement and any post-effective amendments thereto became
      effective and at the Closing

                                       4
<PAGE>
 
      Time (and, if any International Option Securities are purchased, at the
      Date of Delivery), the Registration Statement, the Rule 462(b)
      Registration Statement and any amendments and supplements thereto complied
      and will comply in all material respects with the requirements of the 1933
      Act and the 1933 Act Regulations and did not and will not contain an
      untrue statement of a material fact or omit to state a material fact
      required to be stated therein or necessary to make the statements therein
      not misleading, and the Prospectuses, any preliminary prospectuses and any
      supplement thereto or prospectus wrapper prepared in connection therewith,
      at their respective times of issuance and at the Closing Time, complied
      and will comply in all material respects with any applicable laws or
      regulations of Switzerland in connection with the offer and sale of
      Reserved Securities. Neither of the Prospectuses nor any amendments or
      supplements thereto (including any prospectus wrapper), at the time the
      Prospectuses or any amendments or supplements thereto were issued and at
      the Closing Time (and, if any International Option Securities are
      purchased, at the Date of Delivery), included or will include an untrue
      statement of a material fact or omitted or will omit to state a material
      fact necessary in order to make the statements therein, in the light of
      the circumstances under which they were made, not misleading. If Rule 434
      is used, the Company will comply with the requirements of Rule 434 and the
      Prospectuses shall not be "materially different", as such term is used in
      Rule 434, from the prospectuses included in the Registration Statement at
      the time it became effective. The representations and warranties in this
      subsection shall not apply to statements in or omissions from the
      Registration Statement or the International Prospec tus made in reliance
      upon and in conformity with information furnished to the Company in
      writing by any International Manager through the Lead Managers expressly
      for use in the Registration Statement or the International Prospectus.

            Each preliminary prospectus and the prospectuses filed as part of
      the Registration Statement as originally filed or as part of any amendment
      thereto, or filed pursuant to Rule 424 under the 1933 Act, complied when
      so filed in all material respects with the 1933 Act Regulations and each
      preliminary prospectus and the Prospectuses delivered to the Underwriters
      for use in connection with this offering was identical to the electroni
      cally transmitted copies thereof filed with the Commission pursuant to
      EDGAR, except to the extent permitted by Regulation S-T.

            (ii) Independent Accountants. The accountants who certified the
                 -----------------------
      financial statements and supporting schedules of the Company and its
      subsidiaries included in the Registration Statement are independent public
      accountants as required by the 1933 Act and the 1933 Act Regulations.

                                       5
<PAGE>
 
            (iii) Financial Statements. Each of the historical financial
                  --------------------
      statements included in the Registration Statement and Prospectus, together
      with related schedules and Notes, present fairly (on a consolidated basis
      where so indicated) the financial condition of the entity or entities to
      which such financial statement purports to relate (the "Reported Entity")
      at the date(s) indicated and the statement of operations (or income or
      earnings as indicated in the applicable financial statement) and cash
      flows and (in the case of a Reported Entity for which a statement of
      stockholders' equity is included) stockholders' equity (and partners'
      capital if so indicated in the applicable financial statement) of the
      Reported Entity for the period(s) specified; said financial statements
      have been prepared in conformity with generally accepted accounting
      principles ("GAAP") applied on a consistent basis throughout the periods
      involved (except as otherwise indicated in such financial statements). Any
      supporting schedules included in the Registration Statement present fairly
      in accordance with GAAP the information required to be stated therein. The
      selected historical financial data and the summary historical financial
      information included in the Prospectuses present fairly the information
      shown therein and, in the case of historical financial data or information
      of the Company, have been compiled on a basis consistent with that of the
      audited financial statements included in the Registration Statement. The
      pro forma financial statements and the related notes thereto included in
      the Registration Statement and the Prospectuses present fairly the
      information shown therein, have been prepared in accordance with the
      Commission's rules and guidelines with respect to pro forma financial
      statements and have been properly compiled on the bases described therein,
      and the assumptions used in the preparation thereof are reason able and
      the adjustments used therein are appropriate to give effect to the
      transactions and circumstances referred to therein.

            (iv) No Material Adverse Change in Business. Since the respective
                 --------------------------------------
      dates as of which information is given in the Registration Statement and
      the Prospectuses, except as otherwise stated therein, (A) there has been
      no material adverse change in the condition, financial or otherwise, or in
      the earnings, business affairs or, to the best knowledge of the Company,
      business prospects of the Company and its subsidiaries considered as one
      enterprise, whether or not arising in the ordinary course of business (a
      "Material Adverse Effect"), (B) there have been no transactions entered
      into by the Company or any of its subsidiaries, other than those in the
      ordinary course of business, which are material with respect to the
      Company and its subsidiaries considered as one enterprise, and (C) there
      has been no dividend or distribution of any kind declared, paid or made by
      the Company on any class of its capital stock.

                                       6
<PAGE>
 
            (v) Good Standing of the Company. The Company has been duly
                ----------------------------
      organized and is validly existing as a corporation in good standing under
      the laws of the State of Delaware and has corporate power and authority to
      own, lease and operate its properties and to conduct its business as
      described in the Prospectuses and to enter into and perform its
      obligations under this Agreement; and the Company is duly qualified as a
      foreign corporation to transact business and is in good standing in each
      other jurisdiction in which such qualification is required, whether by
      reason of the ownership or leasing of property or the conduct of business,
      except where the failure so to qualify or to be in good standing would not
      result in a Material Adverse Effect.

            (vi) Good Standing of Subsidiaries. Each subsidiary of the Company
                 -----------------------------
      has been duly organized and is validly existing as a corporation in good
      standing under the laws of the jurisdiction of its incorporation, has
      corporate power and authority to own, lease and operate its properties and
      to conduct its business as described in the Prospectuses and is duly
      qualified as a foreign corporation to transact business and is in good
      standing in each jurisdiction in which such qualification is required,
      whether by reason of the ownership or leasing of property or the conduct
      of business, except where the failure so to qualify or to be in good
      standing would not result in a Material Adverse Effect; except as
      otherwise disclosed in the Registration Statement, all of the issued and
      outstanding capital stock of each such subsidiary has been duly authorized
      and validly issued, is fully paid and non-assessable and is owned by the
      Company, directly or through subsidiaries, free and clear of any security
      interest, mortgage, pledge, lien, encumbrance, claim or equity (except for
      any security interest or pledge contemplated by the Credit Agreement filed
      as Exhibit 10(a) to the Registration Statement); none of the outstanding
      shares of capital stock of any subsidiary was issued in violation of the
      preemptive or similar rights of any security holder of such subsidiary.
      The only subsidiaries of the Company (other than inactive subsidiaries)
      are the subsidiaries listed on Exhibit 21 to the Registration State ment.

            (vii) Capitalization. The authorized, issued and outstanding capital
                  --------------
      stock of the Company is as set forth in the Prospectuses under
      "Description of Capital Stock-General" (except for subsequent issuances,
      if any, pursuant to this Agreement, pursuant to reserva tions, agreements
      or employee benefit plans referred to in the Prospectuses or pursuant to
      the exercise of convertible securities, warrants or options referred to in
      the Prospectuses). The shares of issued and outstanding capital stock of
      the Company have been duly authorized and validly issued and are fully
      paid and non-assessable; none of the outstand ing shares of capital stock
      of the Company was issued in violation of the preemptive or other similar
      rights of any securityholder of the Company. All sales of the Company's

                                       7
<PAGE>
 
      capital stock prior to the date hereof were either (1) made pursuant to a
      registration statement filed by the Company with the Commission under the
      1933 Act or (2) at all relevant times exempt from the registration
      requirements of the 1933 Act and in case (1) and (2) duly registered with
      or the subject of an available exemption from the registration
      requirements of the applicable state securities or blue sky laws.

            (viii) Authorization of Agreement. This Agreement and the U.S.
                   --------------------------
      Purchase Agreement have been duly authorized, executed and delivered by
      the Company.

            (ix) Authorization and Description of Securities. The Securities to
                 -------------------------------------------
      be purchased by the International Managers and the U.S. Underwriters from
      the Company have been duly authorized for issuance and sale to the
      International Managers pursuant to this Agreement and the U.S.
      Underwriters pursuant to the U.S. Purchase Agreement, respec tively, and,
      when issued and delivered by the Company pursuant to this Agreement and
      the U.S. Purchase Agreement, respectively, against payment of the
      consideration set forth herein and the U.S. Purchase Agreement,
      respectively, will be validly issued, fully paid and non-assessable; the
      Common Stock conforms to all statements relating thereto contained in the
      Prospectuses and such description conforms to the rights set forth in the
      instruments defining the same; no holder of the Securities will be subject
      to personal liability by reason of being such a holder; and the issuance
      of the Securities is not subject to the preemptive or other similar rights
      of any securityholder of the Company.

            (x) Absence of Defaults and Conflicts. Neither the Company nor any
                ---------------------------------
      of its subsidiaries is in violation of its charter or by-laws or in
      default in the performance or observance of any obligation, agreement,
      covenant or condition contained in any contract, indenture, mortgage, deed
      of trust, loan or credit agreement, note, lease or other agree ment or
      instrument to which the Company or any of its subsidiaries is a party or
      by which it or any of them may be bound, or to which any of the property
      or assets of the Company or any subsidiary is subject (collectively,
      "Agreements and Instruments") except for such defaults that would not
      result in a Material Adverse Effect; and the execution, delivery and
      performance of this Agreement and the U.S. Purchase Agreement and the
      consumma tion of the transactions contemplated in this Agreement, the U.S.
      Purchase Agreement and in the Registration Statement (including the
      issuance and sale of the Securities and the use of a portion of the
      proceeds from the sale of the Securities to repay indebtedness as
      described in the Prospectuses under the caption "Use of Proceeds") and
      compliance by the Company with its obligations under this Agreement and
      the U.S. Purchase Agreement have been duly authorized by all necessary
      corporate action and do not and will not, whether with or without the
      giving of notice or passage of time or both, conflict with or

                                       8
<PAGE>
 
      constitute a breach of, or default or Repayment Event (as defined below)
      under, or result in the creation or imposition of any lien, charge or
      encumbrance upon any property or assets of the Company or any subsidiary
      pursuant to, the Agreements and Instruments (except for such conflicts,
      breaches or defaults or liens, charges or encumbrances that would not
      result in a Material Adverse Effect), nor will such action result in any
      violation of the provisions of the charter or by-laws of the Company or
      any subsidiary or any applicable law, statute, rule, regulation, judgment,
      order, writ or decree of any govern ment, government instrumentality or
      court, domestic or foreign, having jurisdiction over the Company or any
      subsidiary or any of their assets, properties or operations. As used
      herein, a "Repayment Event" means any event or condition which gives the
      holder of any note, debenture or other evidence of indebtedness (or any
      person acting on such holder's behalf) the right to require the
      repurchase, redemption or repayment of all or a portion of such
      indebtedness by the Company or any subsidiary.

            (xi) Absence of Labor Dispute. No labor dispute with the employees
                 ------------------------
      of the Company or any subsidiary exists or, to the knowledge of the
      Company, is imminent, and the Company is not aware of any existing or
      imminent labor disturbance by the employ ees of any of its or any
      subsidiary's principal suppliers, manufacturers, customers or contractors,
      which, in either case, may reasonably be expected to result in a Material
      Adverse Effect.

            (xii) Absence of Proceedings. There is no action, suit, proceeding,
                  ----------------------
      inquiry or investigation before or brought by any court or governmental
      agency or body, domestic or foreign, now pending, or, to the knowledge of
      the Company, threatened, against or affecting the Company or any
      subsidiary, which is required to be disclosed in the Registration
      Statement (other than as disclosed therein), or which might reasonably be
      expected to result in a Material Adverse Effect, or which might reasonably
      be expected to materially and adversely affect the consummation of the
      transactions contemplated in this Agreement and the U.S. Purchase
      Agreement or the performance by the Company of its obligations hereunder
      or thereunder; the aggregate of all pending legal or governmental
      proceedings to which the Company or any subsidiary is a party or of which
      any of their respective property or assets is the subject which are not
      described in the Registration Statement, including ordinary routine
      litigation incidental to the business, could not reasonably be expected to
      result in a Material Adverse Effect.

            (xiii) Accuracy of Representations and Warranties. To the knowledge
                   ------------------------------------------
of the Company, the representations and warranties made by each of the Initial
Acquired Companies (as defined in the Registration Statement and the
Prospectuses) and the selling stockholders in

                                       9
<PAGE>
 
the respective agreements pursuant to which the Company acquired the Initial
Acquired Companies did not as of the respective dates thereof contain any
inaccuracies that might, singly or in the aggregate, reasonably be expected to
have a Material Adverse Effect.

            (xiv) Accuracy of Exhibits. There are no contracts or documents
                  --------------------
      which are required to be described in the Registration Statement or the
      Prospectuses or to be filed as exhibits thereto which have not been so
      described and filed as required.

            (xv) Possession of Intellectual Property. The Company and its
                 -----------------------------------
      subsidiaries own or possess, or can acquire on reasonable terms, adequate
      patents, patent rights, licenses, inventions, copyrights, know-how
      (including trade secrets and other unpatented and/or unpatentable
      proprietary or confidential information, systems or procedures),
      trademarks, service marks, trade names or other intellectual property
      (collectively, "Intellectual Property") necessary to carry on the business
      now operated by them, and neither the Company nor any of its subsidiaries
      has received any notice or is otherwise aware of any infringement of or
      conflict with asserted rights of others with respect to any Intellectual
      Property or of any facts or circumstances which would render any
      Intellectual Property invalid or inadequate to protect the interest of the
      Company or any of its subsidiaries therein, and which infringement or
      conflict (if the subject of any unfavorable decision, ruling or finding)
      or invalidity or inadequacy, singly or in the aggregate, would result in a
      Material Adverse Effect.

            (xvi) Absence of Further Requirements. No filing with, or
                  -------------------------------
      authorization, approval, consent, license, order, registration,
      qualification or decree of, any court or governmental authority or agency
      is necessary or required for the performance by the Company of its
      obligations hereunder, in connection with the offering, issuance or sale
      of the Securities under this Agreement and the U.S. Purchase Agreement or
      the consumma tion of the transactions contemplated by this Agreement and
      the U.S. Purchase Agree ment, except (i) such as have been already
      obtained or as may be required under the 1933 Act or the 1933 Act
      Regulations, the 1934 Act or the rules and regulations of the Commission
      under the 1934 Act (the "1934 Act Regulations") and foreign or state
      securities or blue sky laws and (ii) such as have been obtained under the
      laws and regulations of Switzerland, pursuant to the offering of the
      Reserved Securities.

            (xvii) Possession of Licenses and Permits. The Company and its
                   ----------------------------------
      subsidiaries possess such permits, licenses, approvals, consents and other
      authorizations (collectively, "Governmental Licenses") issued by the
      appropriate federal, state, local or foreign regulatory agencies or bodies
      necessary to conduct the business now operated by them

                                       10
<PAGE>
 
      except where the failure to so possess such Government Licenses would not,
      singly or in the aggregate, have a Material Adverse Effect; the Company
      and its subsidiaries are in compliance with the terms and conditions of
      all such Governmental Licenses, except where the failure so to comply
      would not, singly or in the aggregate, have a Material Adverse Effect; all
      of the Governmental Licenses are valid and in full force and effect,
      except when the invalidity of such Governmental Licenses or the failure of
      such Govern mental Licenses to be in full force and effect would not have,
      singly or in the aggregate, a Material Adverse Effect; and neither the
      Company nor any of its subsidiaries has received any notice of proceedings
      relating to the revocation or modification of any such Govern mental
      Licenses which, singly or in the aggregate, if the subject of an
      unfavorable decision, ruling or finding, would result in a Material
      Adverse Effect.

            (xviii) Title to Property. The Company and its subsidiaries have
                    -----------------
      good and marketable title to all real property described in the Prospectus
      as owned by the Company and its subsidiaries and good title to all other
      properties described in the Prospectus as owned by them, in each case,
      free and clear of all mortgages, pledges, liens, security interests,
      claims, restrictions or encumbrances of any kind except such as (a) are de
      scribed in the Prospectuses or are not required to be described therein
      pursuant to the 1933 Act or the 1933 Act Regulations or (b) do not, singly
      or in the aggregate, materially interfere with the use made and proposed
      to be made of such property by the Company or any of its subsidiaries; and
      all of the leases and subleases material to the business of the Company
      and its subsidiaries, considered as one enterprise, and under which the
      Com pany or any of its subsidiaries holds properties described in the
      Prospectuses, are in full force and effect, and neither the Company nor
      any subsidiary has any notice of any material claim of any sort that has
      been asserted by anyone adverse to the rights of the Company or any
      subsidiary under any of the leases or subleases mentioned above, or
      affecting or questioning the rights of the Company or such subsidiary to
      the continued possession of the leased or subleased premises under any
      such lease or sublease, which claim, if upheld, would result in a Material
      Adverse Effect.

            (xix) Investment Company Act. The Company is not, and upon the
                  ----------------------
      issuance and sale of the Securities as herein contemplated and the
      application of the net proceeds therefrom as described in the Prospectuses
      will not be, an "investment company" or an entity "controlled" by an
      "investment company" as such terms are defined in the Invest ment Company
      Act of 1940, as amended (the "1940 Act").

            (xx) Environmental Laws. Except as described in the Registration
                 ------------------
      Statement or except as would not, singly or in the aggregate, result in a
      Material Adverse Effect or

                                       11
<PAGE>
 
      except as would not be required to be described in the Registration
      Statement or the Prospectuses pursuant to the 1933 Act or the 1933 Act
      Regulations: (A) neither the Company nor any of its subsidiaries is in
      violation of any federal, state, local or foreign statute, law, rule,
      regulation, ordinance, code, policy or rule of common law or any judicial
      or administrative interpretation thereof, including any judicial or
      administrative order, consent, decree or judgment, relating to pollution
      or protection of human health, the environment (including, without
      limitation, ambient air, surface water, groundwater, land surface or
      subsurface strata) or wildlife, including, without limitation, laws and
      regulations relating to the release or threatened release of chemicals,
      pollutants, contami nants, wastes, toxic substances, hazardous substances,
      petroleum or petroleum products (collectively, "Hazardous Materials") or
      to the manufacture, processing, distribution, use, treatment, storage,
      disposal, transport or handling of Hazardous Materials (collectively,
      "Environmental Laws"), (B) neither the Company nor any of its subsidiaries
      is lacking any permits, authorizations and approvals required under any
      applicable Environmental Laws or are in violation of the requirements of
      such Environmental Laws, (C) there are no pending or to the best knowledge
      of the Company, threatened administrative, regula tory or judicial
      actions, suits, demands, demand letters, claims, liens, notices of noncom
      pliance or violation, investigation or proceedings relating to any
      Environmental Law against the Company or any of its subsidiaries and (D)
      to the knowledge of the Company there are no events or circumstances that
      might reasonably be expected to form the basis of an order for clean-up or
      remediation, or an action, suit or proceeding by any private party or
      governmental body or agency, against or affecting the Company or any of
      its subsidiaries relating to Hazardous Materials or any Environmental
      Laws.

            (xxi) Statistical and Market Data. Nothing has come to the attention
                  ---------------------------
      of the Company that has caused the Company to believe that the statistical
      and market-related data included in the Prospectus are not based on or
      derived from sources that are reliable and accurate in all material
      respects.

            (xxii) Taxes. The Company and each of its subsidiaries have filed
                   -----
      all necessary federal, state, local and foreign income, payroll, franchise
      and other tax returns (after giving effect to extensions) and have paid
      all taxes shown as due thereon or with respect to the Company or any of
      its properties (except where the failure to so file or pay would not
      singly or in the aggregate, have a Material Adverse Effect), and there is
      no tax deficiency that has been, or to the knowledge of the Company is
      likely to be, asserted against the Company, any of its subsidiaries or any
      of their properties or assets that would result in a Material Adverse
      Effect, except for taxes that are being contested in good faith

                                       12
<PAGE>
 
      by appropriate proceedings and with respect to which the Company has
      established adequate reserves in accordance with GAAP.

            (xxiii) Insurance. Neither the Company nor any subsidiary has
                    ---------
      received notice from any insurer providing insurance coverage for the
      Company and its Subsidiaries or agent of such insurer that capital
      improvements or other expenditures will have to be made in order to
      continue present insurance coverage, except such as could not reason ably
      be expected, singularly or in the aggregate, to have a Material Adverse
      Effect.

            (xxiv) Maintenance of Sufficient Internal Controls. The Company and
                   -------------------------------------------
      its subsidiaries maintain a system of internal accounting controls
      sufficient to provide reasonable assurances that (i) transactions are
      executed in accordance with management's general or specific
      authorization; (ii) transactions are recorded as necessary to permit
      preparation of financial statements in conformity with generally accepted
      accounting principles and to maintain accountability for assets; (iii)
      access to assets is permitted only in accordance with management's general
      or specific authorization; and (iv) the recorded accountability for assets
      is compared with existing assets at reasonable intervals and appropriate
      action is taken with respect to any differences.

            (xxv) Registration Rights. There are no persons with registration
                  -------------------
      rights or other similar rights to have any securities registered pursuant
      to the Registration Statement.

            (xxvi) Fees. Other than pursuant to this Agreement, the U.S.
                   ----
      Purchase Agree ment or as described in the Registration Statement and the
      Prospectuses, there are no contracts , agreements or understandings
      between either the Company or its subsidiaries and any person that give
      rise to a valid claim against the Company, any of its subsidiaries or any
      of the Underwriters for a brokerage commission, finder's fee or other like
      payment relating to the transactions contemplated hereby.

      (b) Officer's Certificates. Any certificate signed by any officer of the
Company or any of its subsidiaries delivered to the Global Coordinator, the Lead
Managers or to counsel for the International Managers shall be deemed a
representation and warranty by the Company to each International Manager as to
the matters covered thereby.

      SECTION 2.  Sale and Delivery to International Managers; Closing.
                  ----------------------------------------------------

                                       13
<PAGE>
 
      (a) Initial Securities. On the basis of the representations and warranties
herein contained and subject to the terms and conditions herein set forth, the
Company agrees to sell to each International Manager, severally and not jointly,
and each International Manager, severally and not jointly, agrees to purchase
from the Company, at the price per share set forth in Schedule B, the number of
Initial International Securities set forth in Schedule A opposite the name of
such International Manager, plus any additional number of Initial International
Securities which such International Manager may become obligated to purchase
pursuant to the provisions of Section 10 hereof.

      (b) Option Securities. In addition, on the basis of the representations
and warranties herein contained and subject to the terms and conditions herein
set forth, the Company hereby grants an option to the International Managers,
severally and not jointly, to purchase up to an additional 210,000 shares of
Common Stock at the price per share set forth in Schedule B, less an amount per
share equal to any dividends or distributions declared by the Company and
payable on the Initial International Securities but not payable on the
International Option Securities. The option hereby granted will expire 30 days
after the date hereof and may be exercised in whole or in part from time to time
only for the purpose of covering over-allotments which may be made in connection
with the offering and distribution of the Initial International Securities upon
notice by the Global Coordinator to the Company setting forth the number of
International Option Securities as to which the several International Managers
are then exercising the option and the time and date of payment and delivery for
such International Option Securities. Any such time and date of delivery for the
International Option Securities (a "Date of Delivery") shall be determined by
the Global Coordinator, but shall not be earlier than three or later than seven
full business days after the exercise of said option or at such earlier time as
may be agreed upon by the Global Coordinator and the Company, nor in any event
prior to the Closing Time, as hereinafter defined. If the option is exercised as
to all or any portion of the International Option Securities, each of the
International Managers, acting severally and not jointly, will purchase that
proportion of the total number of International Option Securities then being
purchased which the number of Initial International Securities set forth in
Schedule A opposite the name of such International Manager bears to the total
number of Initial International Securities, subject in each case to such
adjustments as the Global Coordinator in its discretion shall make to eliminate
any sales or purchases of fractional shares.

      (c) Payment. Payment of the purchase price for, and delivery of
certificates for, the Initial Securities shall be made at the offices of
Skadden, Arps, Slate, Meagher & Flom LLP, 919 Third Avenue, New York, New York
10022, or at such other place as shall be agreed upon by the Global Coordinator
and the Company, at 9:00 A.M. (Eastern time) on the third (fourth, if the
pricing occurs after 4:30 P.M. (Eastern time) on any given day) business day
after the date hereof

                                       14
<PAGE>
 
(unless postponed in accordance with the provisions of Section 10), or such
other time not later than ten business days after such date as shall be agreed
upon by the Global Coordinator and the Company (such time and date of payment
and delivery being herein called "Closing Time").

      In addition, in the event that any or all of the International Option
Securities are pur chased by the International Managers, payment of the purchase
price for, and delivery of certificates for, such International Option
Securities shall be made at the above-mentioned offices, or at such other place
as shall be agreed upon by the Global Coordinator and the Company, on each Date
of Delivery as specified in the notice from the Global Coordinator to the
Company.

      Payment shall be made to the Company by wire transfer of immediately
available funds to a bank account designated by the Company, against delivery to
the Lead Managers for the respective accounts of the International Managers of
certificates for the International Securities to be purchased by them. It is
understood that each International Manager has authorized the Lead Managers, for
its account, to accept delivery of, receipt for, and make payment of the
purchase price for, the Initial International Securities and the International
Option Securities, if any, which it has agreed to purchase. Merrill Lynch,
individually and not as representative of the International Managers, may (but
shall not be obligated to) make payment of the purchase price for the Initial
International Securities or the International Option Securities, if any, to be
purchased by any International Manager whose funds have not been received by the
Closing Time or the relevant Date of Delivery, as the case may be, but such
payment shall not relieve such International Manager from its obligations
hereunder.

      (d) Denominations; Registration. Certificates for the Initial
International Securities and the International Option Securities, if any, shall
be in such denominations and registered in such names as the Lead Managers may
request in writing at least one full business day before the Closing Time or the
relevant Date of Delivery, as the case may be. The certificates for the Initial
International Securities and the International Option Securities, if any, will
be made available for examination and packaging by the Lead Managers in The City
of New York not later than 10:00 A.M. (Eastern time) on the business day prior
to the Closing Time or the relevant Date of Delivery, as the case may be.

      SECTION 3. Covenants of the Company. The Company covenants with each
                 ------------------------
Interna tional Manager as follows:

                                       15
<PAGE>
 
            (a) Compliance with Securities Regulations and Commission Requests.
      The Company, subject to Section 3(b), will comply with the requirements of
      Rule 430A or Rule 434, as applicable, and will notify the Global
      Coordinator immediately, and confirm the notice in writing, (i) when any
      post-effective amendment to the Registration State ment shall become
      effective, or any supplement to the Prospectuses or any amended
      Prospectuses shall have been filed, (ii) of the receipt of any comments
      from the Commis sion, (iii) of any request by the Commission for any
      amendment to the Registration Statement or any amendment or supplement to
      the Prospectuses or for additional information, and (iv) of the issuance
      by the Commission of any stop order suspending the effectiveness of the
      Registration Statement or of any order preventing or suspending the use of
      any preliminary prospectus, or of the suspension of the qualification of
      the Securities for offering or sale in any jurisdiction, or of the
      initiation or threatening of any proceedings for any of such purposes. The
      Company will promptly effect the filings necessary pursuant to Rule 424(b)
      and will take such steps as it deems necessary to ascertain promptly
      whether the form of prospectus transmitted for filing under Rule 424(b)
      was received for filing by the Commission and, in the event that it was
      not, it will promptly file such prospectus. The Company will make every
      reasonable effort to prevent the issuance of any stop order and, if any
      stop order is issued, to obtain the lifting thereof at the earliest
      possible moment.

            (b) Filing of Amendments. The Company will give the Global
      Coordinator notice of its intention to file or prepare any amendment to
      the Registration Statement (including any filing under Rule 462(b)), any
      Term Sheet or any amendment, supplement or revision to either the
      prospectus included in the Registration Statement at the time it became
      effective or to the Prospectuses, will furnish the Global Coordinator with
      copies of any such documents a reasonable amount of time prior to such
      proposed filing or use, as the case may be, and will not file or use any
      such document to which the Global Coordinator or counsel for the
      International Managers shall object.

            (c) Delivery of Registration Statements. The Company has furnished
      or will deliver to the Lead Managers and counsel for the International
      Managers, without charge, signed copies of the Registration Statement as
      originally filed and of each amendment thereto (including exhibits filed
      therewith or incorporated by reference therein) and signed copies of all
      consents and certificates of experts, and will also deliver to the Lead
      Managers, without charge, a conformed copy of the Registration Statement
      as originally filed and of each amendment thereto (without exhibits) for
      each of the International Managers. The copies of the Registration
      Statement and each amendment thereto furnished to the International
      Managers will be identical to the electronically transmitted

                                       16
<PAGE>
 
      copies thereof filed with the Commission pursuant to EDGAR, except to the
      extent permitted by Regulation S-T.

            (d) Delivery of Prospectuses. The Company has delivered to each
      Interna tional Manager, without charge, as many copies of each preliminary
      prospectus as such International Manager reasonably requested, and the
      Company hereby consents to the use of such copies for purposes permitted
      by the 1933 Act. The Company will furnish to each International Manager,
      without charge, during the period when the International Prospectus is
      required to be delivered under the 1933 Act or the Securities Exchange Act
      of 1934 (the "1934 Act"), such number of copies of the International
      Prospectus (as amended or supplemented) as such International Manager may
      reasonably request. The International Prospectus and any amendments or
      supplements thereto furnished to the International Managers will be
      identical to the electronically transmitted copies thereof filed with the
      Commission pursuant to EDGAR, except to the extent permitted by Regulation
      S-T.

            (e) Continued Compliance with Securities Laws. The Company will
      comply with the 1933 Act and the 1933 Act Regulations so as to permit the
      completion of the distribution of the Securities as contemplated in this
      Agreement, the U.S. Purchase Agreement and in the Prospectuses. If at any
      time when a prospectus is required by the 1933 Act to be delivered in
      connection with sales of the Securities, any event shall occur or
      condition shall exist as a result of which it is necessary, in the opinion
      of counsel for the International Managers or for the Company, to amend the
      Registration Statement or amend or supplement any Prospectus in order that
      the Prospectuses will not include any untrue statements of a material fact
      or omit to state a material fact necessary in order to make the statements
      therein not misleading in the light of the circumstances existing at the
      time it is delivered to a purchaser, or if it shall be necessary, in the
      opinion of such counsel, at any such time to amend the Registration
      Statement or amend or supplement any Prospectus in order to comply with
      the requirements of the 1933 Act or the 1933 Act Regulations, the Company
      will promptly prepare and file with the Commission, subject to Section
      3(b), such amendment or supplement as may be necessary to correct such
      statement or omission or to make the Registration Statement or the
      Prospectuses comply with such requirements, and the Company will furnish
      to the International Managers such number of copies of such amendment or
      supplement as the International Managers may reasonably request.

            (f) Blue Sky Qualifications. The Company will use its best efforts,
      in cooperation with the International Managers, to qualify the Securities
      for offering and

                                       17
<PAGE>
 
      sale under the applicable securities laws of such states and other
      jurisdictions (domestic or foreign) as the Global Coordinator may
      designate and to maintain such qualifications in effect for a period of
      not less than one year from the later of the effective date of the
      Registration Statement and any Rule 462(b) Registration Statement;
      provided, however, that the Company shall not be obligated to file any
      general consent to service of process or to qualify as a foreign
      corporation or as a dealer in securities in any jurisdiction in which it
      is not so qualified or to subject itself to taxation in respect of doing
      business in any jurisdiction in which it is not otherwise so subject. In
      each jurisdiction in which the Securities have been so qualified, the
      Company will file such statements and reports as may be required by the
      laws of such jurisdiction to continue such qualification in effect for a
      period of not less than one year from the effective date of the
      Registration Statement and any Rule 462(b) Registration Statement.

            (g) Rule 158. The Company will timely file such reports pursuant to
      the 1934 Act as are necessary in order to make generally available to its
      securityholders as soon as practicable an earnings statement for the
      purposes of, and to provide the benefits contem plated by, the last
      paragraph of Section 11(a) of the 1933 Act.

            (h) Use of Proceeds. The Company will use the net proceeds received
      by it from the sale of the Securities in the manner specified in the
      Prospectuses under "Use of Proceeds".

            (i) Listing. The Company will use its best efforts to effect the
      listing of the Common Stock (including the Securities) on the New York
      Stock Exchange.

            (j) Restriction on Sale of Securities. During a period of 180 days
      from the date of the Prospectuses, the Company will not, without the prior
      written consent of the Global Coordinator on behalf of the Underwriters,
      (i) directly or indirectly, offer, pledge, sell, contract to sell, sell
      any option or contract to purchase, purchase any option or contract to
      sell, grant any option, right or warrant for the sale of or otherwise
      dispose of or transfer any share of Common Stock or any securities
      convertible into or exchangeable or exercisable for Common Stock, whether
      now owned or hereafter acquired or with respect to which the power of
      disposition is acquired, or file any registration statement under the 1933
      Act with respect to any of the foregoing (other than as contemplated in
      (E), (F) and (G) below), (ii) enter into any swap or any other agreement
      or any transaction that transfers, in whole or in part, directly or
      indirectly, the economic consequence of ownership of the Common Stock,
      whether any such swap

                                       18
<PAGE>
 
      or transaction is to be settled by delivery of Common Stock or other
      securities, in cash or otherwise, or (iii) waive any Stockholder Lock-up
      Agreement (as such term is defined in the Registration Statement and the
      Prospectuses). Clauses (i) and (ii) of the foregoing sentence shall not
      limit the Company's ability (A) to sell the Securities hereunder or under
      the International Purchase Agreement, (B) to issue shares of Common Stock
      upon the exercise of an option or warrant or the conversion of a security
      outstanding on the date hereof and referred to in the Prospectuses, (C) to
      grant stock options under the 1997 Stock Option Plan (as such term is
      defined in the Regis tration Statement and the Prospectuses), (D) to issue
      shares of Common Stock as consideration for future acquisitions, provided,
      however, that the Company may not issue in excess of 500,000 shares for
      acquisitions unless the recipients of such excess shares enter into
      agreements containing the limitations set forth in the first sentence of
      this paragraph with respect to such additional shares, (E) to file a shelf
      registration statement pursuant to Rule 415 under the 1933 Act relating to
      (a) shares of Common Stock outstanding as of the date of the Prospectuses
      and (b) shares of Common Stock underlying warrants or convertible notes
      outstanding as of the date of the Prospectuses, provided, however, that no
      sales of Common Stock may be made pursuant to such registration statement
      during the period of 180 days from the date of the Prospectuses, (F) to
      file a registration statement under the 1933 Act with respect to shares of
      Common Stock or other securities to be issued after the date hereof as
      consideration for an acquisition or with respect to the potential resale
      of shares issued after the date hereof as consideration for an
      acquisition, provided, however, that no sales may be made pursuant to such
      registration statement except to the extent permitted by clause (D)
      hereof, or (G) file a registration statement under the 1933 Act
      registering the shares of Common Stock that may be issued pursuant to
      options granted or to be granted under the 1997 Stock Option Plan. In
      addition to the foregoing, the Company will (i) require any individual who
      becomes an officer or director of the Company and purchases shares of
      Common Stock of the Company subsequent to the date of the Prospectuses to
      enter into a Lock-up Agreement in the form contained in Exhibit B hereto
      and (ii) in the event any registration rights are granted by the Company
      in regard to shares of Common Stock issuable upon the conversion of any
      outstanding securities of the Company (as contemplated in (B) above, and
      including, but not limited to, a $300,000 principal amount note issued as
      consideration for the acquisition of one of the Initial Acquired
      Companies), also require the holders of shares of Common Stock that are
      the subject of such registration rights to enter into a Lock-up Agreement
      in the form of Exhibit B hereto.

            (k) Reporting Requirements. The Company, during the period when the
      Prospectuses are required to be delivered under the 1933 Act or the 1934
      Act, will file all

                                       19
<PAGE>
 
      documents required to be filed with the Commission pursuant to the 1934
      Act within the time periods required by the 1934 Act and the rules and
      regulations of the Commission thereunder.

            (l) Compliance with NASD Rules. The Company will ensure that the
      Reserved Securities will be restricted as required by the NASD or the NASD
      rules from sale, transfer, assignment, pledge or hypothecation for a
      period of three months following the date of this Agreement. The
      Underwriters will notify the Company as to which Reserved Securities will
      need to be so restricted under applicable NASD rules. At the request of
      the Underwriters, the Company will direct the transfer agent to place a
      stop transfer restriction upon such securities for up to three months as
      specified by the Underwriters. Without the prior written consent of
      Merrill Lynch, the Company will not release any such stop transfer or any
      lock-up agreement entered into for the purpose of complying with NASD
      rules and requirements. Should the Company release, or seek to release,
      any of the Reserved Securities from the foregoing restrictions, the
      Company agrees to reimburse the Underwriters for any reasonable expenses
      (including, without limitation, legal expenses) they incur in connection
      with such release.

            (m) Compliance with Rule 463. The Company will file with the
      Commission such information as may be required pursuant to Rule 463 of the
      1933 Act Regulations.

      SECTION 4. Payment of Expenses. (a) Expenses. The Company will pay all
                 -------------------
expenses incident to the performance of its obligations under this Agreement,
including (i) the preparation, printing and filing of the Registration Statement
(including financial statements and exhibits) as originally filed and of each
amendment thereto, (ii) the preparation, printing and delivery to the
Underwriters of this Agreement, the U.S. Purchase Agreement, the Inter-Syndicate
Agreement, any Agreement among Underwriters and such other documents as may be
required in connection with the offering, purchase, sale, issuance or delivery
of the Securities, (iii) the preparation, issuance and delivery of the
certificates for the Securities to the Underwriters, including any stock or
other transfer taxes and any stamp or other duties payable upon the sale,
issuance or delivery of the Securities to the Underwriters and the transfer of
the Securities between the U.S. Underwriters and the International Managers,
(iv) the fees and disbursements of the Company's counsel, accountants and other
advisors, (v) the qualification of the Securities under securities laws in
accordance with the provisions of Section 3(f) hereof, including filing fees and
the reasonable fees and disbursements of counsel for the Underwriters in
connection therewith and in connection with the preparation of the Blue Sky
Survey and any supplement thereto, (vi) the printing and delivery to the
Underwriters of copies of each preliminary prospectus, any Term Sheets and of
the Prospectuses and any amendments or supplements thereto, (vii) the prepara-

                                       20
<PAGE>
 
tion, printing and delivery to the Underwriters of copies of the Blue Sky Survey
and any supplement thereto, (viii) the fees and expenses of any transfer agent
or registrar for the Securities, (ix) the filing fees incident to, and the
reasonable fees and disbursements of counsel to the Underwriters in connection
with, the review by the NASD of the terms of the sale of the Securities,(x) the
fees and expenses incurred in connection with the listing of the Securities on
the New York Stock Exchange and (xi) all costs and expenses of the Underwriters,
including the fees and disbursements of counsel for the Underwriters, in
connection with matters related to the Reserved Securities which are designated
by the Company for sale to certain employees, directors and business associates
of, and certain other persons designated by, the Company.

      (b) Termination of Agreement. If this Agreement is terminated by the Lead
Managers in accordance with the provisions of Section 5 or Section 9(a)(i)
hereof, the Company shall reimburse the International Managers for all of their
reasonable out-of-pocket expenses, including the reasonable fees and
disbursements of counsel for the International Managers.

      SECTION 5. Conditions of International Managers' Obligations. The
                 -------------------------------------------------
obligations of the several International Managers hereunder are subject to the
accuracy of the representations and warranties of the Company contained in
Section 1 hereof or in certificates of any officer of the Company or any
subsidiary of the Company delivered pursuant to the provisions hereof, to the
performance by the Company of its covenants and other obligations hereunder, and
to the following further conditions:

            (a) Effectiveness of Registration Statement. The Registration
      Statement, including any Rule 462(b) Registration Statement, has become
      effective and at Closing Time no stop order suspending the effectiveness
      of the Registration Statement shall have been issued under the 1933 Act or
      proceedings therefor initiated or threatened by the Commission, and any
      request on the part of the Commission for additional information shall
      have been complied with to the reasonable satisfaction of counsel to the
      Interna tional Managers. A prospectus containing the Rule 430A Information
      shall have been filed with the Commission in accordance with Rule 424(b)
      (or a post-effective amend ment providing such information shall have been
      filed and declared effective in accor dance with the requirements of Rule
      430A) or, if the Company has elected to rely upon Rule 434, a Term Sheet
      shall have been filed with the Commission in accordance with Rule 424(b).

            (b) Opinions of Counsel for Company. At Closing Time, the Lead
      Managers shall have received the favorable opinions, dated as of Closing
      Time, of Ehrenreich Eilenberg Krause & Zivian LLP and Weil, Gotshal &
      Manges LLP, counsel for the

                                       21
<PAGE>
 
      Company, in form and substance reasonably satisfactory to counsel for the
      International Managers, together with signed or reproduced copies of such
      letters for each of the other International Managers to the effect set
      forth in Exhibits A-1 and A-2, respectively, hereto and to such further
      effect as counsel to the International Managers may reasonably request. In
      giving such opinions such counsel may rely, as to all matters governed by
      the laws of jurisdictions other than the law of the State of New York, the
      federal law of the United States and the General Corporation Law of the
      State of Delaware, upon the opinions of counsel reasonably satisfactory to
      counsel to the Lead Managers. Such counsel may also state that, insofar as
      such opinions involve factual matters, they have relied, to the extent
      they deem proper, upon certificates of officers of the Company and its
      subsidiaries and certificates of public officials.

            (c) Opinion of Counsel for International Managers. At Closing Time,
      the Lead Managers shall have received the favorable opinion, dated as of
      Closing Time, of Skadden, Arps, Slate, Meagher & Flom LLP, counsel for the
      International Managers, together with signed or reproduced copies of such
      letter for each of the other International Managers in form and substance
      reasonably satisfactory to the International Managers. In giving such
      opinion such counsel may rely, as to all matters governed by the laws of
      jurisdictions other than the law of the State of New York, the federal law
      of the United States and the General Corporation Law of the State of
      Delaware, upon the opinions of counsel satisfactory to the Lead Managers.
      Such counsel may also state that, insofar as such opinion involves factual
      matters, they have relied, to the extent they deem proper, upon
      certificates of officers of the Company and its subsidiaries and
      certificates of public officials.

            (d) Officers' Certificate. At Closing Time, there shall not have
      been, since the date hereof or since the respective dates as of which
      information is given in the Prospec tuses, any material adverse change in
      the condition, financial or otherwise, or in the earnings, business
      affairs or business prospects of the Company and its subsidiaries
      considered as one enterprise, whether or not arising in the ordinary
      course of business, and the Lead Managers shall have received a
      certificate of the Chief Executive Officer of the Company and of the Chief
      Financial Officer of the Company, dated as of Closing Time, to the effect
      that (i) there has been no such material adverse change, (ii) the
      representations and warranties in Section 1(a) hereof are true and correct
      with the same force and effect as though expressly made at and as of
      Closing Time, (iii) the Company has complied in all material respects with
      all agreements and satisfied all conditions on its part to be performed or
      satisfied at or prior to Closing Time, and (iv) no stop order suspending
      the effectiveness of the Registration Statement has been issued and no

                                       22
<PAGE>
 
      proceedings for that purpose have been instituted or are pending or, to
      the best knowledge of the Company, are contemplated by the Commission.

            (e) Accountant's Comfort Letters. At the time of the execution of
      this Agreement, the Lead Managers shall have received from Ernst & Young
      LLP, Webster, Duke & Co., PA, KPMG Peat Marwick LLP and Grant Thornton,
      LLP letters dated such date, in form and substance satisfactory to the
      Lead Managers, together with signed or reproduced copies of such letters
      for each of the other International Managers, to the effect set forth in
      Annex A hereto, containing statements and information of the type
      ordinarily included in accountants' "comfort letters" to underwriters with
      respect to the financial statements audited by such accountants and
      certain financial information contained in the Registration Statement and
      the Prospectuses.

            (f) Bring-down Comfort Lelleps. At Closing Time, the Lead Managers
      shall have received from Ernst & Young LLP, Webster, Duke & Co., PA, KPMG
      Peat Marwick and Grant Thornton, LLP letters, dated as of Closing Time, to
      the effect that they reaffirm the statements made in the letters furnished
      pursuant to subsection (e) of this Section 5, except that the specified
      date referred to shall be a date not more than three business days prior
      to Closing Time.

            (g) Approval of Listing. At Closing Time, the Securities shall have
      been approved for listing on the New York Stock Exchange, subject only to
      official notice of issuance.

            (h) No Objection. The NASD has confirmed that it has not raised any
      objection with respect to the fairness and reasonableness of the
      underwriting terms and arrangements.

            (i) Lock-up Agreements. At the date of this Agreement, the Lead
      Managers shall have received an agreement substantially in the form of
      Exhibit B hereto signed by each of the persons listed on Schedule C
      hereto.

            (j) Purchase of Initial U.S. Securities. Contemporaneously with the
      purchase by the International Managers of the Initial International
      Securities under this Agreement, the U.S. Underwriters shall have
      purchased the Initial U.S. Securities under the U.S.
      Purchase Agreement.

                                       23
<PAGE>
 
            (k) Conditions to Purchase of International Option Securities. In
      the event that the International Managers exercise their option provided
      in Section 2(b) hereof to purchase all or any portion of the International
      Option Securities, the representations and warranties of the Company
      contained herein and the statements in any certificates furnished by the
      Company or any subsidiary of the Company hereunder shall be true and
      correct as of each Date of Delivery and, at the relevant Date of Delivery,
      the Lead Managers shall have received:

            (i) Officers' Certificate. A certificate, dated such Date of
                ---------------------
            Delivery, of the Chief Executive Officer of the Company and of the
            Chief Financial Officer of the Company confirming that the
            certificate delivered at the Closing Time pursuant to Section 5(d)
            hereof remains true and correct as of such Date of Delivery.

            (ii) Opinions of Counsel for Company. The favorable opinions of
                 -------------------------------
            Ehrenreich Eilenberg Krause & Zivian LLP and Weil, Gotshal & Manges
            LLP, counsel for the Company, in form and substance reasonably
            satisfactory to counsel for the International Managers, dated such
            Date of Delivery, relating to the International Option Securities to
            be purchased on such Date of Delivery and otherwise to the same
            effect as the opinions required by Section 5(b) hereof.

            (iii) Opinion of Counsel for International Managers. The favorable
                  ---------------------------------------------
            opinion of Skadden, Arps, Slate, Meagher & Flom LLP, counsel for the
            International Managers, dated such Date of Delivery, relating to the
            International Option Securities to be purchased on such Date of
            Delivery and otherwise to the same effect as the opinion required by
            Section 5(c) hereof.

            (iv) Bring-down Comfort Letters. Letters from Ernst & Young LLP,
                 --------------------------
            Webster, Duke & Co., PA, KPMG Peat Marwick LLP and Grant Thornton,
            LLP, in form and substance satisfactory to the Lead Managers and
            dated such Date of Delivery, substantially in the same form and
            substance as the letters furnished to the Lead Managers pursuant to
            Section 5(f) hereof, except that the "specified date" in the letters
            furnished pursuant to this paragraph shall be a date not more than
            five days prior to such Date of Delivery.

      (l) Additional Documents. At Closing Time and at each Date of Delivery
counsel for the International Managers shall have been furnished with such
documents and opinions as they may reasonably require for the purpose of
enabling them to pass upon the issuance and sale of the Securities as herein
contemplated, or in order to evidence the accuracy of any of the

                                       24
<PAGE>
 
representations or warranties, or the fulfillment of any of the conditions,
herein contained; and all proceedings taken by the Company in connection with
the issuance and sale of the Securities as herein contemplated shall be
reasonably satisfactory in form and substance to the Lead Managers and counsel
for the International Managers.

      (m) Termination of Agreement. If any condition specified in this Section
shall not have been fulfilled when and as required to be fulfilled, this
Agreement, or, in the case of any condition to the purchase of International
Option Securities on a Date of Delivery which is after the Closing Time, the
obligations of the several International Managers to purchase the relevant
Option Securities may be terminated by the Lead Managers by notice to the
Company at any time at or prior to Closing Time or such Date of Delivery, as the
case may be, and such termination shall be without liability of any party to any
other party except as provided in Section 4 and except that Sections 1, 6, 7 and
8 shall survive any such termination and remain in full force and effect.

      SECTION 6.  Indemnification.
                  ---------------

      (a) Indemnification of International Managers. The Company agrees to
indemnify and hold harmless each International Manager and each person, if any,
who controls any International Manager within the meaning of Section 15 of the
1933 Act or Section 20 of the 1934 Act as follows:

            (i) against any and all loss, liability, claim, damage and expense
      whatsoever, as incurred, arising out of any untrue statement or alleged
      untrue statement of a material fact contained in the Registration
      Statement (or any amendment thereto), including the Rule 430A Information
      and the Rule 434 Information, if applicable, or the omission or alleged
      omission therefrom of a material fact required to be stated therein or
      necessary to make the statements therein not misleading or arising out of
      any untrue statement or alleged untrue statement of a material fact
      included in any preliminary prospectus or the Prospectuses (or any
      amendment or supplement thereto), or the omission or alleged omission
      therefrom of a material fact necessary in order to make the statements
      therein, in the light of the circumstances under which they were made, not
      misleading;

            (ii) against any and all loss, liability, claim, damage and expense
      whatsoever, as incurred, arising out of (A) the violation of any
      applicable laws or regulations of Switzerland as a result of the offering
      of the Reserved Securities and (B) any untrue statement or alleged untrue
      statement of a material fact included in any supplement or prospectus
      wrapper material distributed in Switzerland in connection with the
      reservation

                                       25
<PAGE>
 
      and sale of the Reserved Securities to certain employees, directors and
      business associ ates of, and certain other persons designated by, the
      Company or the omission or alleged omission therefrom of a material fact
      necessary to make the statements therein, when considered in conjunction
      with the Prospectuses or preliminary prospectuses, not misleading;

            (iii) against any and all loss, liability, claim, damage and expense
      whatsoever, as incurred, to the extent of the aggregate amount paid in
      settlement of any litigation, or any investigation or proceeding by any
      governmental agency or body, commenced or threatened, or of any claim
      whatsoever based upon any such untrue statement or omis sion, or any such
      alleged untrue statement or omission or in connection with any violation
      of the nature referred to in Section 6(a)(ii)(A) hereof; provided that
      (subject to Section 6(d) below) any such settlement is effected with the
      written consent of the Company; and

            (iv) against any and all expense whatsoever, as incurred (including,
      subject to Section 6(c) hereof, the fees and disbursements of counsel
      chosen by Merrill Lynch), reasonably incurred in investigating, preparing
      or defending against any litigation, or any investigation or proceeding by
      any governmental agency or body, commenced or threatened, or any claim
      whatsoever based upon any such untrue statement or omission, or any such
      alleged untrue statement or omission or in connection with any violation
      of the nature referred to in Section 6(a)(ii)(A) hereof, to the extent
      that any such expense is not paid under (i), (ii) or (iii) above;

      provided, however, that this indemnity agreement shall not apply to any
      --------  -------
      loss, liability, claim, damage or expense to the extent arising out of any
      untrue statement or omission or alleged untrue statement or omission made
      in reliance upon and in conformity with written information furnished to
      the Company by any International Manager through the Lead Managers
      expressly for use in the Registra tion Statement (or any amendment
      thereto), including the Rule 430A Information and the Rule 434
      Information, if applicable, or any preliminary prospectus or the
      International Prospectus (or any amendment or supplement thereto);
      provided, further, that the Company will not be liable to any Underwriter
      --------  -------
      or any person controlling such Under writer with respect to any such
      untrue statement or omission made in any Preliminary Prospectus that is
      corrected in the Prospectus (or any amendment or supplement thereto) if
      the person asserting any such loss, claim, damage or liability purchased
      Securities from such Underwriter but was not sent or given a copy of the
      Prospectus (as amended or supplemented) at or prior to the written
      confirmation of the sale of such Securities to such person in any case
      where such delivery of the Prospectus (as amended or supplemented) is
      required by the Act, unless such failure to deliver the Prospectus (as
      amended or

                                       26
<PAGE>
 
      supplemented) was a result of noncompliance by the Company with Sections
      5(d) or 5(e) of this Agreement..

      (b) Indemnification of Company, Directors and Officers. Each International
Manager severally agrees to indemnify and hold harmless the Company, its
directors, each of its officers who signed the Registration Statement, and each
person, if any, who controls the Company within the meaning of Section 15 of the
1933 Act or Section 20 of the 1934 Act against any and all loss, liability,
claim, damage and expense described in the indemnity contained in subsection (a)
of this Section, as incurred, but only with respect to untrue statements or omis
sions, or alleged untrue statements or omissions, made in the Registration
Statement (or any amendment thereto), including the Rule 430A Information and
the Rule 434 Information, if applicable, or any preliminary international
prospectus or the International Prospectus (or any amendment or supplement
thereto) in reliance upon and in conformity with written information furnished
to the Company by such International Manager through the Lead Managers expressly
for use in the Registration Statement (or any amendment thereto) or such
preliminary prospectus or the International Prospectus (or any amendment or
supplement thereto).

      (c) Actions against Parties; Notification. Each indemnified party shall
give notice as promptly as reasonably practicable to each indemnifying party of
any action commenced against it in respect of which indemnity may be sought
hereunder, but failure to so notify an indemnifying party shall not relieve such
indemnifying party from any liability hereunder to the extent it is not
materially prejudiced as a result thereof and in any event shall not relieve it
from any liability which it may have otherwise than on account of this indemnity
agreement. In the case of parties indemnified pursuant to Section 6(a) above,
counsel to the indemnified parties shall (subject to the following sentence) be
selected by Merrill Lynch, and, in the case of parties indemnified pursuant to
Section 6(b) above, counsel to the indemnified parties shall be selected by the
Company. In case any such action is brought against any indemnified party, and
it notifies the indemnifying party of the commencement thereof, the indemnifying
party will be entitled to participate therein and, to the extent that it may
wish, jointly with any other indemnifying party similarly notified, to assume
the defense thereof with counsel satisfactory to such indemnified party;
provided, however, that counsel to the indemnifying party shall not (except with
the consent of the indemnified party) also be counsel to the indemnified party
and provided, further, that if the defendants in any such action include both
the indemnified party and the indemnifying party and the indemnified party shall
have reasonably concluded that there may be one or more legal defenses available
to it and/or other indemnified parties which are different from or additional to
those available to the indemnifying party, the indemnifying party shall not have
the right to direct the defense of such action on behalf of such indemnified
party or parties and such indemnified party or parties shall have the right to
select separate

                                       27
<PAGE>
 
counsel to defend such action on behalf of such indemnified party or parties. 
In no event shall the indemnifying parties be liable for fees and expenses of
more than one counsel (in addition to any local counsel) separate from their own
counsel for all indemnified parties in connection with any one action or
separate but similar or related actions in the same jurisdic tion arising out of
the same general allegations or circumstances; After notice from the
indemnifying party to such indemnified party of its election so to assume the
defense thereof and approval by such indemnified party of counsel appointed to
defend such action, the indemnifying party will not be liable to such
indemnified party under this Section 6 for any legal or other expenses, other
than reasonable costs of investigation, subsequently incurred by such
indemnified party in connection with the defense thereof, unless (i) the
indemnified party shall have employed separate counsel in accordance with the
proviso to the next preceding sentence (it being understood, however, that in
connection with such action the indemnifying party shall not be liable for the
expenses of more than one separate counsel (in addition to local counsel) in any
one action or separate but substantially similar actions in the same
jurisdiction arising out of the same general allegations or circumstances,
designated by the U.S. Representatives in the case of paragraph (a) of this
Section 6, representing the indemni fied parties under such paragraph (a) who
are parties to such action or actions) or (ii) the indemnifying party does not
promptly retain counsel satisfactory to the indemnified party or (iii) the
indemnifying party has authorized the employment of counsel for the indemnified
party at the expense of the indemnifying party. The indemnifying party will not
be liable for the costs and expenses of any settlement of such action effected
by such indemnified party without the consent of the indemnifying party.

            No indemnifying party shall, without the prior written consent of
the indemnified parties, settle or compromise or consent to the entry of any
judgment with respect to any litigation, or any investigation or proceeding by
any governmental agency or body, commenced or threatened, or any claim
whatsoever in respect of which indemnification or contribution could be sought
under this Section 6 or Section 7 hereof (whether or not the indemnified parties
are actual or potential parties thereto), unless such settlement, compromise or
consent (i) includes an unconditional release of each indemnified party from all
liability arising out of such litigation, investigation, proceeding or claim and
(ii) does not include a statement as to or an admission of fault, culpability or
a failure to act by or on behalf of any indemnified party.

      (d) Settlement without Consent if Failure to Reimburse. If at any time an
indemnified party shall have requested an indemnifying party to reimburse the
indemnified party for fees and expenses of counsel, such indemnifying party
agrees that it shall be liable for any settlement of the nature contemplated by
Section 6(a)(ii) effected without its written consent if (i) such settlement is
entered into more than 45 days after receipt by such indemnifying party of the

                                       28
<PAGE>
 
aforesaid request, (ii) such indemnifying party shall have received notice of
the terms of such settlement at least 30 days prior to such settlement being
entered into and (iii) such indemnifying party shall not have reimbursed such
indemnified party in accordance with such request prior to the date of such
settlement.

      (e) Indemnification for Reserved Securities. In connection with the offer
and sale of the Reserved Securities, the Company agrees, promptly upon a request
in writing, to indemnify and hold harmless the Underwriters from and against any
and all losses, liabilities, claims, damages and expenses incurred by them as a
result of the failure of certain employees, directors and business associates
of, and certain other persons designated by, the Company to pay for and accept
delivery of Reserved Securities which, by the end of the first business day
following the date of this Agreement, were subject to a properly confirmed
agreement to purchase.

      SECTION 7. Contribution. If the indemnification provided for in Section 6
                 ------------
hereof is for any reason unavailable to or insufficient to hold harmless an
indemnified party in respect of any losses, liabilities, claims, damages or
expenses referred to therein, then each indemnifying party shall contribute to
the aggregate amount of such losses, liabilities, claims, damages and expenses
incurred by such indemnified party, as incurred, (i) in such proportion as is
appropriate to reflect the relative benefits received by the Company on the one
hand and the International Managers on the other hand from the offering of the
Securities pursuant to this Agreement or (ii) if the allocation provided by
clause (i) is not permitted by applicable law, in such proportion as is
appropriate to reflect not only the relative benefits referred to in clause (i)
above but also the relative fault of the Company on the one hand and of the
International Managers on the other hand in connection with the statements or
omissions, or in connection with any violation of the nature referred to in
Section 6(a)(ii)(A) hereof, which resulted in such losses, liabilities, claims,
damages or expenses, as well as any other relevant equitable considerations.

      The relative benefits received by the Company on the one hand and the
International Managers on the other hand in connection with the offering of the
International Securities pursuant to this Agreement shall be deemed to be in the
same respective proportions as the total net proceeds from the offering of the
International Securities pursuant to this Agreement (before deducting expenses)
received by the Company and the total underwriting discount received by the
International Managers, in each case as set forth on the cover of the
International Prospectus, or, if Rule 434 is used, the corresponding location on
the Term Sheet, bear to the aggregate initial public offering price of the
International Securities as set forth on such cover.

      The relative fault of the Company on the one hand and the International
Managers on the other hand shall be determined by reference to, among other
things, whether any such untrue or

                                       29
<PAGE>
 
alleged untrue statement of a material fact or omission or alleged omission to
state a material fact relates to information supplied by the Company or by the
International Managers and the parties' relative intent, knowledge, access to
information and opportunity to correct or prevent such statement or omission or
any violation of the nature referred to in Section 6(a)(ii)(A) hereof.

      The Company and the International Managers agree that it would not be just
and equitable if contribution pursuant to this Section 7 were determined by pro
rata allocation (even if the International Managers were treated as one entity
for such purpose) or by any other method of allocation which does not take
account of the equitable considerations referred to above in this Section 7. The
aggregate amount of losses, liabilities, claims, damages and expenses incurred
by an indemnified party and referred to above in this Section 7 shall be deemed
to include any legal or other expenses reasonably incurred by such indemnified
party in investigating, preparing or defending against any litigation, or any
investigation or proceeding by any governmental agency or body, commenced or
threatened, or any claim whatsoever based upon any such untrue or alleged untrue
statement or omission or alleged omission.

      Notwithstanding the provisions of this Section 7, no International Manager
shall be required to contribute any amount in excess of the amount by which the
total price at which the International Securities underwritten by it and
distributed to the public were offered to the public exceeds the amount of any
damages which such International Managers has otherwise been required to pay by
reason of any such untrue or alleged untrue statement or omission or alleged
omission.

      No person guilty of fraudulent misrepresentation (within the meaning of
Section 11(f) of the 1933 Act) shall be entitled to contribution from any person
who was not guilty of such fraudulent misrepresentation.

      For purposes of this Section 7, each person, if any, who controls an
International Manager within the meaning of Section 15 of the 1933 Act or
Section 20 of the 1934 Act shall have the same rights to contribution as such
International Manager, and each director of the Company, each officer of the
Company who signed the Registration Statement, and each person, if any, who
controls the Company within the meaning of Section 15 of the 1933 Act or Section
20 of the 1934 Act shall have the same rights to contribution as the Company.
The International Managers' respective obligations to contribute pursuant to
this Section 7 are several in proportion to the number of Initial International
Securities set forth opposite their respective names in Schedule A hereto and
not joint.

                                       30
<PAGE>
 
      SECTION 8. Representations, Warranties and Agreements to Survive Delivery.
                 --------------------------------------------------------------
All representations, warranties and agreements contained in this Agreement or in
certificates of officers of the Company or any of its subsidiaries submitted
pursuant hereto, shall remain operative and in full force and effect, regardless
of any investigation made by or on behalf of any International Manager or
controlling person, or by or on behalf of the Company, and shall survive
delivery of the Securities to the International Managers.

      SECTION 9.  Termination of Agreement.
                  ------------------------

      (a) Termination; General. The Lead Managers may terminate this Agreement,
by notice to the Company, at any time at or prior to Closing Time (i) if there
has been, since the time of execution of this Agreement or since the respective
dates as of which information is given in the International Prospectus, any
material adverse change in the condition, financial or otherwise, or in the
earnings, business affairs or business prospects of the Company and its
subsidiaries considered as one enterprise, whether or not arising in the
ordinary course of business, or (ii) if there has occurred any material adverse
change in the financial markets in the United States or the international
financial markets, any outbreak of hostilities or escalation thereof or other
calamity or crisis or any change or development involving a prospective change
in national or international political, financial or economic conditions, in
each case the effect of which is such as to make it, in the judgment of the Lead
Managers, impracticable to market the Securities or to enforce contracts for the
sale of the Securities, or (iii) if trading in any securities of the Company has
been suspended or materially limited by the Commission or the New York Stock
Exchange, or if trading generally on the American Stock Exchange or the New York
Stock Exchange or in the Nasdaq National Market has been suspended or materially
limited, or minimum or maximum prices for trading have been fixed, or maximum
ranges for prices have been required, by any of said exchanges or by such system
or by order of the Commission, the National Association of Securities Dealers,
Inc. or any other governmental authority, or (iv) if a banking moratorium has
been declared by either Federal or New York authorities.

      (b) Liabilities. If this Agreement is terminated pursuant to this Section,
such termination shall be without liability of any party to any other party
except as provided in Section 4 hereof, and provided further that Sections 1, 6,
7 and 8 shall survive such termination and remain in full force and effect.

      SECTION 10. Default by One or More of the International Managers. If one
                  ----------------------------------------------------
or more of the International Managers shall fail at Closing Time or a Date of
Delivery to purchase the Securities which it or they are obligated to purchase
under this Agreement (the "Defaulted Securities"), the Lead Managers shall have
the right, within 24 hours thereafter, to make

                                       31
<PAGE>
 
arrangements for one or more of the non-defaulting International Managers, or
any other underwriters, to purchase all, but not less than all, of the Defaulted
Securities in such amounts as may be agreed upon and upon the terms herein set
forth; if, however, the Lead Managers shall not have completed such arrangements
within such 24-hour period, then:

            (a) if the number of Defaulted Securities does not exceed 10% of the
      number of International Securities to be purchased on such date, each of
      the non-defaulting Interna tional Managers shall be obligated, severally
      and not jointly, to purchase the full amount thereof in the proportions
      that their respective underwriting obligations hereunder bear to the
      underwriting obligations of all non-defaulting International Managers, or

            (b) if the number of Defaulted Securities exceeds 10% of the number
      of Interna tional Securities to be purchased on such date, this Agreement
      or, with respect to any Date of Delivery which occurs after the Closing
      Time, the obligation of the International Managers to purchase and of the
      Company to sell the Option Securities to be purchased and sold on such
      Date of Delivery shall terminate without liability on the part of any
      non-defaulting International Manager.

      No action taken pursuant to this Section shall relieve any defaulting
International Manager from liability in respect of its default.

      In the event of any such default which does not result in a termination of
this Agreement or, in the case of a Date of Delivery which is after the Closing
Time, which does not result in a termination of the obligation of the
International Managers to purchase and the Company to sell the relevant
International Option Securities, as the case may be, either the Lead Managers or
the Company shall have the right to postpone Closing Time or the relevant Date
of Delivery, as the case may be, for a period not exceeding seven days in order
to effect any required changes in the Registration Statement or Prospectus or in
any other documents or arrangements. As used herein, the term "International
Manager" includes any person substituted for an International Manager under this
Section 10.

      SECTION 11. Notices. All notices and other communications hereunder shall
                  -------
be in writing and shall be deemed to have been duly given if mailed or
transmitted by any standard form of telecommunication. Notices to the
International Managers shall be directed to the Lead Managers at North Tower,
World Financial Center, New York, New York 10281-1201, attention of Robert A.
Simensky; and notices to the Company shall be directed to it at Four Greenwich
Office Park, Greenwich, Connecticut 06830, attention of Bradley S. Jacobs, with
copies to Oscar D. Folger, 321 Fifth Avenue, 24th Floor, New York, New York
10281 and Joseph Ehrenreich,

                                       32
<PAGE>
 
Ehrenreich Eilenberg Krause & Zivian LLP, 11 East 44th Street, New York, New
York 10017.

      SECTION 12. Parties. This Agreement shall each inure to the benefit of and
                  -------
be binding upon the International Managers and the Company and their respective
successors. Nothing expressed or mentioned in this Agreement is intended or
shall be construed to give any person, firm or corporation, other than the
International Managers and the Company and their respective successors and the
controlling persons and officers and directors referred to in Sections 6 and 7
and their heirs and legal representatives, any legal or equitable right, remedy
or claim under or in respect of this Agreement or any provision herein
contained. This Agreement and all conditions and provisions hereof are intended
to be for the sole and exclusive benefit of the International Managers and the
Company and their respective successors, and said controlling persons and
officers and directors and their heirs and legal representatives, and for the
benefit of no other person, firm or corporation. No purchaser of Securities from
any International Manager shall be deemed to be a successor by reason merely of
such purchase.

      SECTION 13.  GOVERNING LAW AND TIME. THIS AGREEMENT SHALL BE GOVERNED BY
                   ----------------------
AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK. SPECIFIED
TIMES OF DAY REFER TO NEW YORK CITY TIME.

      SECTION 14.  Effect of Headings. The Article and Section headings herein
                   ------------------
and the Table of Contents are for convenience only and shall not affect the
construction hereof.

                                       33
<PAGE>
 
      If the foregoing is in accordance with your understanding of our
agreement, please sign and return to the Company a counterpart hereof, whereupon
this instrument, along with all counterparts, will become a binding agreement
between the International Managers and the Company in accordance with its terms.

                                Very truly yours,

                                UNITED RENTALS, INC.

                                By ____________________________________
                                    Name:
                                    Title:

CONFIRMED AND ACCEPTED, 
  as of the date first above written:

MERRILL LYNCH INTERNATIONAL
DONALDSON, LUFKIN & JENRETTE INTERNATIONAL
MORGAN GRENFELL & CO. LIMITED

By: MERRILL LYNCH INTERNATIONAL

By _______________________________
         Authorized Signatory

For themselves and as Lead Managers of the 
other International Managers named in Schedule A hereto.

                                       34
<PAGE>
 
                                  SCHEDULE A

                                                             Number of
                                                       Initial International
Name of International Manager                               Securities
- -----------------------------                               ----------
Merrill Lynch International.............................
Donaldson, Lufkin & Jenrette International..............
Morgan Grenfell & Co. Limited...........................

                                                             --------

Total...................................................     1,400,000
                                                           ===========


                                  Sch A - 1
<PAGE>
 
                                  SCHEDULE B

                             United Rentals, Inc.

                       1,400,000 Shares of Common Stock
                          (Par Value $.01 Per Share)

            1. The initial public offering price per share for the Securities,
determined as provided in said Section 2, shall be $ .

            2. The purchase price per share for the International Securities to
be paid by the several International Managers shall be $ , being an amount equal
to the initial public offering price set forth above less $  per share; provided
that the purchase price per share for any International Option Securities
purchased upon the exercise of the over-allotment option described in Section
2(b) shall be reduced by an amount per share equal to any dividends or
distributions declared by the Company and payable on the Initial International
Securities but not payable on the International Option Securities.

                                  Sch B - 1
<PAGE>
 
                                  SCHEDULE C

                         List of persons and entities
                              subject to lock-up

Bradley S. Jacobs
Wayland R. Hicks
John N. Milne
Michael J. Nolan
Robert P. Miner
Sandra E. Welwood
Kurtis T. Barker
Daniel E. Imig
Joseph J. Kondrup, Jr.
Kai E. Nyby
Richard A. Volonino
Ronald M. DeFeo
Richard J. Heckmann
Gerald Tsai Jr.
Joe Bloodworth
Bradley F. Garruth
William Leslie Doggett
Frank Erwin
Equus II Partnership

                                  Sch C - 1
<PAGE>
 
Exhibit A-1

                     FORM OF OPINION OF COMPANY'S COUNSEL
                          TO BE DELIVERED PURSUANT TO
                                 SECTION 5(b)

      As to various questions of fact material to our opinion, we have relied
upon the certificates of officers and upon certificates of public officials.
With regard to the due incorporation of corporations (other than the Company)
and the good standing of corporations (other than the Company), we have (subject
to the next sentence) relied entirely upon certifi cates of public officials.
With regard to the tax good standing of certain corporations (other than the
Company), we have relied solely upon a certificate of an officer of such
corporation to the effect that the corporation has filed the most recent annual
report required by the law of such jurisdiction and that all franchise taxes
required to be paid under such law have been paid. We have also examined such
corporate documents and records and other certificates, and have made such
investigations of law, as we have deemed necessary in order to render the
opinion hereinafter set forth. We have assumed the authenticity of all documents
submitted to us as originals, the genuineness of all signatures, the legal
capacity of natural persons and the conformity to the originals of all documents
submitted to us as copies. We have also assumed that all documents examined by
us have been duly and validly authorized, executed and delivered by each of the
parties thereto other than the Company.

            (i) The Company has been duly incorporated and is validly existing
      as a corporation in good standing under the laws of the State of Delaware.

            (ii) The Company has corporate power and authority to own, lease and
      operate its properties and to conduct its business as described in the
      Prospectus and to enter into and perform its obligations under the
      Purchase Agreement.

            (iii) The Company is duly qualified as a foreign corporation to
      transact business and is in good standing in each jurisdiction in which
      such qualification is required, whether by reason of the ownership or
      leasing of property or the conduct of business, except where the failure
      so to qualify or to be in good standing would not result in a Material
      Adverse Effect.

                                    A-1-1
<PAGE>
 
            (iv) The authorized, issued and outstanding capital stock of the
      Company is as set forth in the Prospectus under "Description of Capital
      Stock--General" (except for subsequent issuances, if any, pursuant to the
      Purchase Agreement or pursuant to reservations, agreements or employee
      benefit plans referred to in the Prospectus or pursuant to the exercise of
      convertible securities, warrants or options referred to in the
      Prospectus); the shares of issued and outstanding capital stock of the
      Company have been duly authorized and validly issued and are fully paid
      and non-assessable; and none of the outstanding shares of capital stock of
      the Company was issued in violation of any preemptive or other similar
      rights of any security holder of the Company arising by statute or the
      Company's certificate of incorporation or by-laws or, to the best of our
      knowledge, any other preemptive or other similar rights of any security
      holder of the Company.

            (v) The Securities have been duly authorized for issuance and sale
      to the Underwriters pursuant to the Purchase Agreement and, when issued
      and delivered by the Company pursuant to the Purchase Agreement against
      payment of the consideration set forth in the Purchase Agreement, will be
      validly issued and fully paid and non-assessable and no holder of the
      Securities is or will be subject to personal liability by reason of being
      such a holder.

            (vi) The issuance of the Securities is not subject to preemptive or
      other similar rights of any security holder of the Company arising by
      statute or the Com pany's certificate of incorporation or by-laws or, to
      the best of our knowledge, any other preemptive or other similar rights of
      any security holder of the Company.

            (vii) Each subsidiary has been duly incorporated and is validly
      existing as a corporation in good standing under the laws of the
      jurisdiction of its incorporation, has corporate power and authority to
      own, lease and operate its properties and to conduct its business as
      described in the Prospectus and is duly qualified as a foreign corporation
      to transact business and is in good standing in each jurisdiction in which
      such qualifica tion is required, whether by reason of the ownership or
      leasing of property or the conduct of business, except where the failure
      so to qualify or to be in good standing would not result in a Material
      Adverse Effect; except as otherwise disclosed in the Registration
      Statement and other than as contemplated by the Credit Agreement of the
      Company filed as Exhibit 10(a) to the Registration Statement, all of the
      issued and outstanding capital stock of each subsidiary has been duly
      authorized and validly issued, is fully paid and non-assessable and, to
      the best of our knowledge, is owned by the Company, directly or through
      subsidiaries, free and clear of any security interest,

                                    A-1-2
<PAGE>
 
      mortgage, pledge, lien, encumbrance, claim or equity; none of the
      outstanding shares of capital stock of any subsidiary was issued in
      violation of the preemptive or similar rights of any security holder of
      such subsidiary.

            (viii) The Purchase Agreement has been duly authorized, executed and
      delivered by the Company.

            (ix) The Registration Statement, including any Rule 462(b)
      Registration Statement, has been declared effective under the 1933 Act;
      any required filing of the Prospectus pursuant to Rule 424(b) has been
      made in the manner and within the time period required by Rule 424(b);
      and, to the best of our knowledge, no stop order suspending the
      effectiveness of the Registration Statement or any Rule 462(b) Registra
      tion Statement has been issued under the 1933 Act and no proceedings for
      that purpose have been instituted or are pending or threatened by the
      Commission.

            (x) The Registration Statement, including any Rule 462(b)
      Registration Statement, the Rule 430A Information and the Rule 434
      Information, as applicable, the Prospectus and each amendment or
      supplement to the Registration Statement and Prospectus as of their
      respective effective or issue dates (other than the financial statements
      and supporting schedules included therein or omitted therefrom, as to
      which we need express no opinion) complied as to form in all material
      respects with the requirements of the 1933 Act and the 1933 Act
      Regulations.

            (xi) If Rule 434 has been relied upon, the Prospectus was not
      "materially different," as such term is used in Rule 434, from the
      prospectus included in the Registration Statement at the time it became
      effective.

            (xii) The form of certificate used to evidence the Common Stock
      complies in all material respects with all applicable statutory
      requirements, with any applicable requirements of the charter and by-laws
      of the Company and the requirements of the New York Stock Exchange.

            (xiii) To the best of our knowledge, there is not pending or
      threatened any action, suit, proceeding, inquiry or investigation, to
      which the Company or any subsidiary is a party, or to which the property
      of the Company or any subsidiary is subject, before or brought by any
      court or governmental agency or body, domestic or foreign, which might
      reasonably be expected to result in a Material Adverse Effect, or

                                    A-1-3
<PAGE>
 
      which might reasonably be expected to materially and adversely affect the
      properties or assets thereof or the consummation of the transactions
      contemplated in the Purchase Agreement or the performance by the Company
      of its obligations thereunder.

            (xiv) The information in the Prospectus under "Dividend Policy" and
      "De scription of Capital Stock", "Certain Charter and By-Law Provisions",
      and in the Registration Statement under Item 14 and Item 15, insofar as
      they purport to constitute a summary of the terms of the Common Stock, the
      provisions of the Company's certificate of incorporation or By-laws or
      specific provisions of the Delaware General Corporation Law referred to
      therein, are accurate summaries in all material respects of such terms or
      provisions, as the case may be.

            (xv) To the best of our knowledge, neither the Company nor any
      subsidiary is in violation of its charter or by-laws.

            (xvi) To the best of our knowledge, neither the Company nor any
      subsidiary is in default in the due performance or observance of any
      material obligation, agree ment, covenant or condition contained in any
      contract, indenture, mortgage, loan agreement, note, lease or other
      agreement or instrument that is described or referred to in the
      Registration Statement or the Prospectus or filed or incorporated by
      reference as an exhibit to the Registration Statement which violations or
      defaults are required to be described in the prospectus and are not so
      described or would, individually or in the aggregate, have a Material
      Adverse Effect or effect the validity of the Securities.

            (xvii) No filing with, or authorization, approval, consent, license,
      order, registration, qualification or decree of, any court or governmental
      authority or agency, domestic or foreign (other than under the 1933 Act
      and the 1933 Act Regulations and the 1934 Act and the 1934 Act
      Regulations, which have been obtained, or as may be required under the
      securities or blue sky laws of the various states, as to which we need
      express no opinion) is necessary or required in connection with the due
      authoriza tion, execution and delivery of the Purchase Agreement or for
      the offering, issuance or sale of the Securities.

            (xviii) The execution, delivery and performance of the Purchase
      Agreement and the consummation of the transactions contemplated in the
      Purchase Agreement and in the Registration Statement (including the
      issuance and sale of the Securities and the use of a portion of the net
      proceeds from the sale of the Securities to repay outstanding indebtedness
      as described in the Prospectus under the caption "Use Of Proceeds") and

                                    A-1-4
<PAGE>
 
      compliance by the Company with its obligations under the Purchase
      Agreement (A) after reasonable investigation do not and will not, whether
      with or without the giving of notice or lapse of time or both, conflict
      with or constitute a breach of, or default or Repayment Event (as defined
      in Section 1(a)(x) of the Purchase Agreement) under or result in the
      creation or imposition of any lien, charge or encumbrance upon any
      property or assets of the Company or any subsidiary pursuant to any
      contract, inden ture, mortgage, deed of trust, loan or credit agreement,
      note, lease or any other agreement or instrument, known to us, to which
      the Company or any subsidiary is a party or by which it or any of them may
      be bound, or to which any of the property or assets of the Company or any
      subsidiary is subject (except for such conflicts, breaches or defaults,
      Repayment Events or liens, charges or encumbrances that would not have a
      Material Adverse Effect), (B) result in any violation of the provisions of
      the charter or by-laws of the Company or any subsidiary, or (C) to the
      best of our knowledge, result in any violation of the provisions of any
      applicable law, statute, rule or regulation of the United States of
      America or included in the Delaware General Corporate Law (except we
      express no opinion as to "blue sky" laws), judgment, order, writ or
      decree, known to us, of any government, government instrumentality or
      court, domestic or foreign, having jurisdiction over the Company or any
      subsidiary or any of their respective properties, assets or operations.

            (xix) To the best of our knowledge, there are no persons with
      registration rights or other similar rights to have any securities
      registered pursuant to the Registra tion Statement.

            (xx) The Company is not an "investment company" or an entity
      "controlled" by an "investment company," as such terms are defined in the
      1940 Act.

            (xxi) We have reviewed the Prospectus and the Registration Statement
      and participated in discussions with your representatives and those of the
      Company, its accountants and its other counsel. Although we have not
      undertaken, except as otherwise indicated in this opinion, to investigate
      or verify independently, and do not assume responsibility for, the
      accuracy, completeness or fairness of the statements contained in the
      Registration Statement, on the basis of the information that we gained in
      the course of the performance of such services and our representation of
      the Company, we confirm to you that nothing that came to our attention in
      the course of such review or representation has caused us to belief that
      (i) the Registration Statement or any amendment thereto, including the
      Rule 430A Information and Rule 434 Informa tion (if applicable), (except
      for financial statements and schedules and other financial

                                    A-1-5
<PAGE>
 
      data included therein or omitted therefrom, as to which we need make no
      statement), at the time such Registration Statement or any such amendment
      became effective, contained an untrue statement of a material fact or
      omitted to state a material fact required to be stated therein or
      necessary to make the statements therein not misleading or that the
      Prospectus or any amendment or supplement thereto (except for financial
      statements and schedules and other financial data included therein or
      omitted there from, as to which we need make no statement), at the time
      the Prospectus was issued, at the time any such amended or supplemented
      prospectus was issued or at the Closing Time, included or includes an
      untrue statement of a material fact or omitted or omits to state a
      material fact necessary in order to make the statements therein, in the
      light of the circumstances under which they were made, not misleading or
      (ii) that there are any franchises, contracts, indentures, mortgages, loan
      agreements, notes, leases or other instruments required to be described or
      referred to in the Registration Statement or to be filed as exhibits
      thereto other than those described or referred to therein or filed or
      incorporated by reference as exhibits thereto or that any descriptions of
      or references to any of the foregoing are not correct in all material
      respects.

            In rendering such opinion, such counsel may rely, as to matters of
fact (but not as to legal conclusions), to the extent they deem proper, on
certificates of responsible officers of the Company and public officials. Such
opinion shall not state that it is to be governed or qualified by, or that it is
otherwise subject to, any treatise, written policy or other document relating to
legal opinions, including, without limitation, the Legal Opinion Accord of the
ABA Section of Business Law (1991).

                                    A-1-6
<PAGE>
 
                                                                   Exhibit A-2

                         FORM OF OPINION OF COMPANY'S
                       COUNSEL TO BE DELIVERED PURSUANT
                               TO SECTION 5(b)

      (i) The Company is a corporation duly incorporated, validly existing and
in good standing under the laws of the State of Delaware, and has all requisite
corporate power and authority to own, lease and operate its properties and to
carry on its business as described in the Prospectuses and to enter into and
perform its obligations under the Purchase Agreements.

      (ii) The authorized, issued and outstanding capital stock of the Company
is as set forth in the Prospectuses under the caption entitled "Description of
Capital Stock-General" (except for subsequent issuances pursuant to the Purchase
Agreements or pursuant to reservations, agreements, rights, or stock option or
employee benefit plans referred to in the Prospectuses, or pursuant to the
exercise of convertible securities, warrants, rights or options referred to in
the Prospectuses, or pursuant to an adjustment to the amount of the Stock
Consideration (as defined in the Prospectuses)). All of the issued and
outstanding shares of capital stock of the Company have been duly authorized and
validly issued and are fully paid and nonassessable; and none of the outstanding
shares of capital stock of the Company were issued in violation of preemptive
rights pursuant to law or in the Company's certificate of incorporation or
by-laws.

      (iii) The Securities have been duly authorized and, when issued and
delivered as contemplated by the Purchase Agreements against payment of the
consideration therefor set forth in the Purchase Agreements, will be validly
issued, fully paid and nonassessable and free of preemptive rights pursuant to
law or in the Company's certificate of incorporation or by laws, and no holder
of the Securities is or will be subject to personal liability solely by reason
of being such a holder.

      (iv) The execution, delivery and performance of the Purchase Agreements by
the Company have been duly authorized by all necessary corporate action on the
part of the Company. The Purchase Agreements have been duly and validly executed
and delivered by the Company.

      (v) We have been informed that the Registration Statement was declared
effective under the 1933 Act as of __:__ _ . m. on December __, 1997, and to our
knowledge, as of 10:00 a.m. on the date hereof, no stop order suspending the
effectiveness of the Registration Statement has been issued under the 1933 Act
and, to our knowledge, no proceedings for that purpose have been

                                    A-2-1
<PAGE>
 
instituted or are pending or threatened by the Commission. The Prospectuses have
been filed with the Commission pursuant to Rule 424(b) under the 1933 Act.

      (vi) The Registration Statement and the Prospectuses (except for the
financial statements and the notes thereto and the other financial, statistical
and accounting data included in the Registration Statement or the Prospectuses,
as to which we express no opinion) comply as to form in all material respects
with the requirements of the 1933 Act and the rules and regulations thereunder.

      (vii) The statements contained in the Prospectuses under the captions
"Dividend Policy," "Description of Capital Stock," "Certain Charter and By-Law
Provisions" and "Certain United States Federal Tax Considerations," and in Part
II of the Registration Statement under Item 14 and Item 15, insofar as they
purport to describe the provisions of the documents referred to therein or
matters of federal or Delaware corporate law, constitute a fair summary thereof
in material respects; and all descriptions in the Registration Statement of
contracts or agreements to which the Company or any of its subsidiaries is a
party are accurate in all material respects.

      (viii) No consent, approval, waiver, license or authorization or other
action by or filing with any New York, Delaware corporate or federal
governmental authority is required in connection with the execution and delivery
by the Company of the Purchase Agreements or the consummation by the Company of
the transactions contemplated thereby, except for filings and other actions
required under or pursuant to (i) the 1933 Act and the rules and regulations
promulgated thereunder, which have been made or obtained, and (ii) the 1934 Act
and the rules and regulations promulgated thereunder, any other federal or state
securities or "blue sky" laws, and the rules of the New York Stock Exchange, as
to which we express no opinion.

      (ix) The Company is not an "investment company" or an entity "controlled"
by an investment company", as such terms are defined in the 1940 Act.

      (x) To our knowledge, there are no persons with registrations rights or
other similar rights to have any securities registered pursuant to the
Registration Statement.

      (xi) We have participated in conferences with directors, officers and
other representatives of the Company, representatives of the independent public
accountants for the Company, representatives of the Underwriters and
representatives of counsel for the Underwriters, at which conferences the
contents of the Registration Statement and the Prospectuses and related matters
were discussed, and, although we have not independently verified and are not
passing upon

                                    A-2-2
<PAGE>
 
and assume no responsibility for the accuracy, completeness or fairness of the
statements contained in the Registration Statement and Prospectuses (except to
the extent specified in the foregoing opinions), no facts have come to our
attention which lead us to believe that the Registration Statement, on the
effective date thereof, contained an untrue statement of a material fact or
omitted to state a material fact required to be stated therein or necessary to
make the statements contained therein not misleading or that the Prospectuses,
on the date thereof or on the date hereof, contained or contain an untrue
statement of a material fact or omitted or omits to state a material fact
required to be stated therein or necessary to make the statements contained
therein, in light of the circumstances under which they were made, not
misleading (it being understood that we express no view with respect to the
financial statements and related notes, the financial statement schedules and
the other financial, statistical and accounting data included in the
Registration Statement or Prospectuses).

            In rendering such opinion, such counsel may rely, as to matters of
fact (but not as to legal conclusions), to the extent they deem proper, on
certificates of responsible officers of the Company and public officials. Such
opinion shall not state that it is to be governed or qualified by, or that it is
otherwise subject to, any treatise, written policy or other document relating to
legal opinions, including, without limitation, the Legal Opinion Accord of the
ABA Section of Business Law (1991).

            In rendering such opinion, such counsel may rely, as to matters of
fact (but not as to legal conclusions), to the extent they deem proper, on
certificates of responsible officers of the Company and public officials. Such
opinion shall not state that it is to be governed or qualified by, or that it is
otherwise subject to, any treatise, written policy or other document relating to
legal opinions, including, without limitation, the Legal Opinion Accord of the
ABA Section of Business Law (1991).

                                    A-2-3
<PAGE>
 
        FORM OF LOCK-UP FROM DIRECTORS, OFFICERS ND OTHER STOCKHOLDERS
                           PURSUANT TO SECTION 5(i)

                                                                     Exhibit B

                               December  , 1997

MERRILL LYNCH INTERNATIONAL,
DONALDSON, LUFKIN & JENRETTE INTERNATIONAL
DEUTSCHE MORGAN GRENFELL INC.
  as Lead Managers of the several International Managers to
  be named in the within mentioned International Purchase Agreement
c/o  Merrill Lynch International
Ropemaker Place
25 Ropemaker Street
London EC24 9L4
England

      Re:   Proposed Initial Public Offering by United Rentals, Inc.
            -------------------------------------------------------

Ladies and Gentlemen:

      The undersigned, a stockholder and an officer and/or director of United
Rentals, Inc., a Delaware corporation (the "Company"), understands that Merrill
Lynch International ("Merrill Lynch"), Donaldson, Lufkin & Jenrette
International and Morgan Grenfell & Co. Limited propose to enter into an
International Purchase Agreement (the "International Purchase Agreement") with
the Company providing for the public offering of shares (the "Securities") of
the Company's common stock, par value $.01 per share (the "Common Stock"). In
recognition of the benefit that such an offering will confer upon the
undersigned as a stockholder and an officer and/or director of the Company, and
for other good and valuable consideration, the receipt and sufficiency of which
are hereby acknowledged, the undersigned agrees with each underwriter to be
named in the

                                     B-1
<PAGE>
 
International Purchase Agreement that, during a period of 180 days from the date
of the International Purchase Agreement, the undersigned will not, without the
prior written consent of Merrill Lynch & Co., on behalf of the International
Managers named in the International Purchase Agreement, directly or indirectly,
(i) offer, pledge, sell, contract to sell, sell any option or contract to
purchase, purchase any option or contract to sell, grant any option, right or
warrant for the sale of, or otherwise dispose of or transfer any shares of the
Company's Common Stock or any securities convertible into or exchangeable or
exercisable for Common Stock, whether now owned or hereafter acquired by the
undersigned or with respect to which the undersigned has or hereafter acquires
the power of disposition, or file any registration statement under the
Securities Act of 1933, as amended, with respect to any of the foregoing or (ii)
enter into any swap or any other agreement or any transaction that transfers, in
whole or in part, directly or indirectly, the economic consequence of ownership
of the Common Stock, whether any such swap or transaction is to be settled by
delivery of Common Stock or other securities, in cash or otherwise.

      Nothing contained herein limits the ability of the undersigned (i) to
transfer shares of Common Stock in a private placement pursuant to an exemption
from the registration requirements of the 1933 Act or (ii) to pledge shares of
Common Stock as security of indebtedness, provided, however, in either case the
transferee or pledgee agrees to be bound by the limitations contained herein.

                                          Very truly yours,

                                          Signature:_____________________

                                          Print Name:____________________

                                     B-2
<PAGE>
 
                                                                       Annex A

         FORM OF ACCOUNTANTS' COMFORT LETTER PURSUANT TO SECTION 5(e)

            We are independent public accountants with respect to the Company
within the meaning of the 1933 Act and the applicable published 1933 Act
Regulations

            (i) in our opinion, the audited financial statements and the related
      financial statement schedules included in the Registration Statement and
      the Prospectus comply as to form in all material respects with the
      applicable accounting requirements of the 1933 Act and the published rules
      and regulations thereunder;

            (ii) on the basis of procedures (but not an examination in
      accordance with generally accepted auditing standards) consisting of a
      reading of the unaudited interim financial statements of the Company for
      the period ended September 30, 1997, included in the Registration
      Statement and the Prospectus (collectively, the "Quarterly Financials"), a
      reading of the minutes of all meetings of the stockholders and directors
      of the Company and its subsidiaries and the Audit and Compensation
      Committees of the Company's Board of Directors and any subsidiary
      committees since October 1, 1997, inquiries of certain officials of the
      Company and its subsidiaries responsible for financial and accounting
      matters, a review of interim financial information in accordance with
      standards established by the American Institute of Certified Public
      Accountants in Statement on Auditing Standards No. 71, Interim Financial
      Information ("SAS 71"), with respect to the period ended September 30,
      1997 and such other inquiries and procedures as may be specified in such
      letter, nothing came to our attention that caused us to believe that:

            (A) the Quarterly Financials included in the Registration Statement
            and the Prospectus do not comply as to form in all material respects
            with the applicable accounting requirements of the 1933 Act and the
            1933 Act Regulations or any material modifications should be made to
            the financial statements included in the Registration Statement and
            the Prospectus for them to be in conformity with generally accepted
            accounting principles; or

                                  Annex A-1
<PAGE>
 
            (B ) at September 30, 1997 and at a specified date not more than
            five days prior to the date of this Agreement, there was any change
            in the [cash and cash equivalents, net rental equipment, total
            assets, debt or stockholders' equity] of the Company and its
            subsidiaries or any decrease in the [cash and cash equivalents, net
            rental equipment or total assets] of the Company and its
            subsidiaries or any increase in the [debt or stockholders' equity]
            of the Company and its subsidiaries, in each case as compared with
            amounts shown in the latest balance sheet included in the
            Registration Statement, except in each case for changes, decreases
            or increases that the Registration Statement discloses have occurred
            or may occur;

            (iii) based upon the procedures set forth in clause (ii) above and a
      reading of the Selected Historical and Pro Forma Consolidated Financial
      Information included in the Registration Statement and a reading of the
      financial statements from which such data were derived, nothing came to
      our attention that caused us to believe that the Selected Historical and
      Pro Forma Consolidated Financial Information included in the Registration
      Statement do not comply as to form in all material respects with the
      disclosure requirements of Item 301 of Regulation S-K of the 1933 Act ,
      that the amounts included in the Selected Historical and Pro Forma
      Consolidated Financial Information are not in agreement with the
      corresponding amounts in the audited financial statements for the
      respective periods or that the financial statements not included in the
      Registration Statement from which certain of such data were derived are
      not in conformity with generally accepted accounting principles;

            (iv) we have compared the information in the Registration Statement
      under selected captions with the disclosure requirements of Regulation S-K
      of the 1933 Act and on the basis of limited procedures specified herein.
      nothing came to our attention that caused us to believe that this
      information does not comply as to form in all material respects with the
      disclosure requirements of Items 302, 402 and 503(d), respectively, of
      Regulation S-K;

            (v) based upon the procedures set forth in clause (ii) above, a
      reading of the unaudited financial statements of the Company for the most
      recent period that have not been included in the Registration Statement
      and a review of such financial statements in accordance with SAS 71,
      nothing came to our attention that caused us to believe that the unaudited
      amounts for [total revenues, total cost of operations, operating income
      (loss), income (loss) before income taxes, net income (loss) or earnings
      (loss) per share] for the most recent period do not agree with the amounts
      set forth in the unaudited consolidated financial statements for those
      periods or that such unaudited amounts were not determined on a basis
      substantially consistent with that of the corresponding amounts in the
      audited financial statements;

                                   Annex A-2
<PAGE>
 
            (vi) we are unable to and do not express any opinion on the pro
      forma financial information (the "Pro Forma Statements") included in the
      Registration Statement or on the pro forma adjustments applied to the
      historical amounts included in the Pro Forma Statement; however, for
      purposes of this letter we have:

                  (A)   read the Pro Forma Statements;

                  (B) performed an audit of the financial statements to which
            the pro forma adjustments were applied;

                  (C) made inquiries of certain officials of the Company who
            have responsibility for financial and accounting matters about the
            basis for their determina tion of the pro forma adjustments and
            whether the Pro Forma Statements complies as to form in all material
            respects with the applicable accounting requirements of Rule 11-02
            of Regulation S-X; and

                  (D) proved the arithmetic accuracy of the application of the
            pro forma adjustments to the historical amounts in the Pro Forma
            Statements; and on the basis of such procedures and such other
            inquiries and procedures as specified herein, nothing came to our
            attention that caused us to believe that the Pro Forma Statements
            included in the Registration Statement do not comply as to form in
            all material respects with the applicable requirements of Rule 11-02
            of Regulation S-X or that the pro forma adjustments have not been
            properly applied to the historical amounts in the compilation of
            those statements; and

            (vii) in addition to the procedures referred to in clause (ii)
      above, we have performed other procedures, not constituting an audit, with
      respect to certain amounts, percentages, numerical data and financial
      information appearing in the Registration Statement, which are specified
      herein, and have compared certain of such items with, and have found such
      items to be in agreement with, the accounting and financial records of the
      Company.

                                   Annex A-3


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