RENCO METALS INC
8-K, 1996-07-17
PRIMARY SMELTING & REFINING OF NONFERROUS METALS
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                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                    FORM 8-K

                                 CURRENT REPORT
                     Pursuant to Section 13 or 15(d) of the
                         Securities Exchange Act of 1934


Date of Report: July 3, 1996
(Date of earliest event reported)




                               Renco Metals, Inc.
- --------------------------------------------------------------------------------
            (Exact name of registrant as specified in its charter)



Delaware                                333-4513                     13-3724916
- ------------------------              -------------          -------------------
(State or Other Juris-                (Commission               (I.R.S. Employer
diction of Incorporation)              File Number)          Identification No.)



238 North 2200 West, Salt Lake City, UT                                    84116
- --------------------------------------------------------------------------------
(Address of Principal Executive Office)                               (Zip Code)


Registrant's telephone number, including area code:               (801) 532-2043
                                                   -----------------------------




- --------------------------------------------------------------------------------
                     This Document contains exactly 4 Pages.
                         The Exhibit Index is on page 4.





<PAGE>





ITEM 5.  OTHER EVENTS
         ------------

     On  July  3,  1996,  Renco  Metals,   Inc.,  a  Delaware  corporation  (the
"Company"),  issued $150,000,000  aggregate principal amount of the Company's 11
1/2% Senior  Notes due 2003 (the  "Notes").  The offering  was  underwritten  by
Donaldson, Lufkin & Jenrette Securities Corporation (the "Underwriter") pursuant
to an  underwriting  agreement  dated June 28,  1996,  by and among the Company,
Magnesium Corporation of America ("Magcorp"),  Sabel Industries, Inc. ("Sabel"),
and the Underwriter. The Notes are fully and unconditionally guaranteed by Sabel
and Magcorp.



ITEM 7.  FINANCIAL STATEMENTS, PRO FORMA FINANCIAL INFORMATION AND EXHIBITS
         ------------------------------------------------------------------

     (c) Exhibits



                   Item 601(a) of       
                   Regulation S-K
Exhibit No.        Exhibit No.                        Description
- -----------        --------------     ------------------------------------------

    4.1                  4            Indenture,  dated as of July 1, 1996,  for
                                      the 11 1/2% Senior Notes due 2003.




<PAGE>



     Pursuant to the  requirements  of the Securities  Exchange Act of 1934, the
Registrant  has duly caused this report to be signed on behalf of the Registrant
by the undersigned thereunto duly authorized.

                                          Renco Metals, Inc.





                                           By:  /s/ Roger Fay
                                                Roger Fay
                                                Vice President


Date:  July 17, 1996




<PAGE>




                                  EXHIBIT INDEX


                  Item 601(a) of      
                  Regulation S-K
Exhibit No.       Exhibit No.                       Description
- ----------        ---------------        --------------------------------------
   4.1                  4                Indenture  dated as of July 1, 1996 for
                                         the 11 1/2% Senior Notes due 2003




- ------------------------------------------------------------------------------



                               RENCO METALS, INC.,

                                   as Issuer,


                        MAGNESIUM CORPORATION OF AMERICA


                                       and


                             SABEL INDUSTRIES, INC.,

                                 as Guarantors,


                                       and


                              FLEET NATIONAL BANK,

                                   as Trustee


                          ----------------------------


                                    INDENTURE


                            Dated as of July 1, 1996


                          ----------------------------


                          11-1/2% Senior Notes due 2003




- ------------------------------------------------------------------------------



<PAGE>

     INDENTURE  dated as of July 1, 1996,  among RENCO METALS,  INC., a Delaware
corporation,  as issuer (the  "Company"),  MAGNESIUM  CORPORATION OF AMERICA,  a
Delaware  corporation,   as  Guarantor  ("MagCorp"  or  a  "Guarantor"),   SABEL
INDUSTRIES,   INC.,  an  Alabama   corporation,   as  Guarantor  ("Sabel"  or  a
"Guarantor"),  and FLEET  NATIONAL  BANK,  a national  banking  association,  as
Trustee (the "Trustee").

     The Company and the  Guarantors  have duly  authorized  the  execution  and
delivery of this  Indenture  to provide for the issuance of the  Securities  (as
hereinafter  defined) to be issued as  provided  for in this  Indenture  and the
related Guarantees (as hereinafter defined) of MagCorp and Sabel.

     The parties  hereto  agree as follows for the benefit of each other and for
the equal and ratable  benefit of the Holders  (as  hereinafter  defined) of the
Securities:

                                    ARTICLE I


                   DEFINITIONS AND INCORPORATION BY REFERENCE
                   ------------------------------------------
                  
               
     SECTION 1.1  Definitions.
                  -----------

     "Acquired Indebtedness" means Indebtedness of a Person existing at the time
such Person becomes a Subsidiary of the Company or assumed in connection with an
Asset Acquisition of such Person,  including,  without limitation,  Indebtedness
incurred in connection  with, or in  anticipation  of, such Person's  becoming a
Subsidiary of the Company or such acquisition.

     "Affiliate" of any specified Person means any other Person which,  directly
or indirectly,  controls, is controlled by or is under direct or indirect common
control  with  such  specified  Person.  For the  purposes  of this  definition,
"control"  when used with  respect to any  Person  means the power to direct the
management and policies of such Person, directly or indirectly,  whether through
the  ownership of voting  securities,  by contract or  otherwise,  and the terms
"controlling" and "controlled" have meanings correlative to the foregoing.

     "Affiliate Transaction" has the meaning provided in Section 4.14.

     "Agent" means any Registrar or Paying Agent.

     "Asset  Acquisition"  means  (i) any  capital  contribution  (by  means  of
transfers  of cash or other  property  to others or  payments  for  property  or
services  for the  account  or use of  others,  or  otherwise)  or  purchase  or
acquisition of Capital Stock by the Company or any of its  Subsidiaries to or in
any other Person, in either case as a result of which such Person shall become a
Subsidiary of the Company or any of its  Subsidiaries or shall be merged with or
into the  Company  or any of its  Subsidiaries  or (ii) any  acquisition  by the
Company or any of its  Subsidiaries of the assets of any Person which constitute
substantially all of an operating unit or business of such Person.
<PAGE>

     "Asset Sale" means any direct or indirect sale, conveyance, transfer, lease
(including by means of  sale-leaseback) or other disposition to any Person other
than the Company or a Subsidiary of the Company,  in one transaction or a series
of related  transactions,  of (i) any  Capital  Stock of any  Subsidiary  of the
Company or (ii) any other  property or asset of the Company or any Subsidiary of
the  Company,  in each case other than in the  ordinary  course of business  and
other than isolated transactions which do not exceed $250,000 individually.  For
the purposes of this  definition,  the term "Asset Sale" shall not include sales
of receivables not a part of a sale of the business from which they arose or any
disposition  of all or  substantially  all of the  properties  and assets of the
Company that is governed under and complies with the  requirements  set forth in
Section 5.1.

     "Asset Sale Offer" has the meaning provided in Section 4.13(a).

     "Asset Sale Purchase Date" has the meaning provided in Section 4.13(a).

     "Available Amount" has the meaning provided in Section 4.13(a).

     "Bankruptcy  Law" means Title 11 of the U.S. Code or any similar federal or
state law for the relief of debtors.

     "Base Period" has the meaning provided in Section 4.12(a)(ii).

     "Board of  Directors"  means the Board of  Directors  of the  Company  or a
Guarantor,  as  appropriate,  or  any  committee  of  such  Board  of  Directors
authorized to act for it hereunder.

     "Board Resolution" means a copy of a resolution  certified by the Secretary
or an Assistant Secretary of the Company or a Guarantor, as appropriate, to have
been duly adopted by the Board of  Directors  of the Company or a Guarantor,  as
appropriate,  and  to  be  in  full  force  and  effect  on  the  date  of  such
certification and delivered to the Trustee.

     "Book-Entry Security" means a Security represented by a Global Security and
registered in the name of the nominee of the Depository.

     "Business  Day"  means any day  except a  Saturday,  a Sunday or any day on
which  banking  institutions  in New  York,  New York or the  city in which  the
principal  corporate  trust  office of the  Trustee is located  are  required or
authorized by law or other governmental action to be closed.

     "Capital  Stock"  means,  with  respect to any Person,  any and all shares,
interests,  participations,  rights in, or other equivalents (however designated
and whether  voting or  non-voting)  of such  Person's  capital  stock,  whether
outstanding  on the Issue Date or issued  after the Issue Date,  and any and all
rights,  warrants or options  exchangeable  for or convertible into such capital
stock.
<PAGE>

     "Capitalized  Lease  Obligation"  means any obligation to pay rent or other
amounts  under a lease of (or other  agreement  conveying  the right to use) any
property (whether real, personal or mixed) that is required to be classified and
accounted for as a capital lease obligation under GAAP, and, for the purposes of
this  Indenture,  the  amount  of  such  obligation  at any  date  shall  be the
capitalized amount thereof at such date, determined in accordance with GAAP.

     "Cash  Equivalents"  means,  at any time, (i) any evidence of  Indebtedness
with a maturity of 180 days or less issued or directly and fully  guaranteed  or
insured by the United States of America or any agency or instrumentality thereof
(provided  that the full  faith and  credit of the  United  States of America is
pledged in support thereof);  (ii) certificates of deposit or acceptances with a
maturity of 180 days or less of any  financial  institution  that is a member of
the Federal  Reserve  System having  combined  capital and surplus and undivided
profits of not less than $250,000,000; (iii) commercial paper with a maturity of
180 days or less issued by a  corporation  (except an  Affiliate of the Company)
organized  under the laws of any state of the United  States or the  District of
Columbia and rated at least A-1 by Standard & Poor's  Ratings  Group or at least
P-1 by Moody's  Investors  Service,  Inc.;  and (iv)  repurchase  agreements and
reverse repurchase  agreements  relating to marketable direct obligations issued
or  unconditionally  guaranteed by the United States of America or issued by any
agency thereof and backed by the full faith and credit of the United States,  in
each  case  maturing  within  one year from the date of  acquisition;  provided,
however,  that the terms of such agreements comply with the guidelines set forth
in the Federal Financial  Agreements of Depository  Institutions with Securities
Dealers and Others, as adopted by the Comptroller of the Currency.

     "Change of Control" means (i) the direct or indirect sale, lease,  exchange
or other  transfer of all or  substantially  all of the assets of the Company or
Renco to any Person or entity or group of Persons or entities  acting in concert
as a partnership  or other group (a "Group of Persons")  other than an Affiliate
of the Company, (ii) the merger or consolidation of the Company or Renco with or
into another corporation with the effect that the then existing  shareholders of
the  Company or Renco,  as the case may be,  hold less than 50% of the  combined
voting power of the then outstanding  securities of the surviving corporation of
such merger or the corporation resulting from such consolidation ordinarily (and
apart from rights arising under special  circumstances) having the right to vote
in the election of directors,  (iii) the  replacement of a majority of the Board
of  Directors  of  Renco,  over  a  two-year  period,  from  the  directors  who
constituted  the Board of  Directors at the  beginning of such period,  and such
replacement shall not have been approved by a vote of at least a majority of the
Board of Directors  then still in office who either were members of the Board of
Directors at the  beginning of such period or whose  election as a member of the
Board of Directors  was  previously  so  approved,  or (iv) a Person or Group of
Persons (other than Renco and its Affiliates)  shall, as a result of a tender or
exchange  offer,  open  market  purchases,  privately  negotiated  purchases  or
otherwise,  have  become the direct or  indirect  beneficial  owner  (within the
meaning of Rule 13d-3 under the Exchange  Act) of  securities  of the Company or
Renco  representing  50% or  more  of the  combined  voting  power  of the  then
outstanding securities of the Company or Renco ordinarily (and apart from rights
accruing under special  circumstances)  having the right to vote in the election
of directors.
<PAGE>

     "Change of Control Date" has the meaning provided in Section 4.15.

     "Change of Control Offer" has the meaning provided in Section 4.15.

     "Change of Control Payment Date" has the meaning provided in Section 4.15.

     "Common  Stock"  means,  with  respect to any  Person,  any and all shares,
interests or other  participations in, and other equivalents (however designated
and  whether  voting or  nonvoting)  of, such  Person's  common  stock,  whether
outstanding  on the Issue Date or issued  after the Issue  Date,  and  includes,
without limitation, all series and classes of such common stock.

     "Company" means the party named as such in this Indenture until a successor
replaces it in accordance with the provisions of this Indenture and, thereafter,
means the successor.

     "Consolidated  Cash Flow" means, with respect to any Person for any period,
the  Consolidated  Net Income of such Person for such period  increased  (to the
extent deducted in determining  Consolidated  Net Income) by the sum of: (i) all
United  States  Federal,  state and foreign  income taxes of such Person paid or
accrued according to GAAP for such period (other than income taxes  attributable
to extraordinary,  unusual or nonrecurring  gains or losses);  (ii) all interest
expense  of such  Person  paid or accrued  in  accordance  with GAAP (net of any
interest  income)  for such period  (including  amortization  of original  issue
discount  and the  interest  portion of  deferred  payment  obligations);  (iii)
depreciation and depletion;  (iv) amortization  including,  without  limitation,
amortization  of  capitalized  debt issuance  costs;  and (v) any other non-cash
charges to the extent deducted from Consolidated Net Income (including  non-cash
expenses recognized in accordance with Financial  Accounting  Standards Bulletin
Number 106).

     "Consolidated Net Income" means, with respect to any Person for any period,
the  aggregate  of the Net Income of such Person and its  Subsidiaries  for such
period, on a consolidated basis,  determined in accordance with GAAP;  provided,
however, that (a) the Net Income of any Person (the "Other Person") in which the
Person in question or one of its  Subsidiaries has a joint interest with a third
party (which  interest  does not allow the net income of such Other Person to be
consolidated  into the net income of the Person in question in  accordance  with
GAAP)  shall be  included  only to the  extent  of the  amount of  dividends  or
distributions  paid to the Person in  question  or the  Subsidiary,  (b) the Net
Income of any  Subsidiary  of the  Person in  question  that is  subject  to any
contractual  restriction or limitation on the payment of dividends or the making
of other  distributions  shall be excluded to the extent of such  restriction or
limitation  (provided  that  this  clause  (b)  shall  not  apply  to  any  such
restrictions  or  limitations  with respect to the  Guarantors  contained in the
Credit Facilities as such restrictions or limitations are in effect on the Issue
Date),  (c)(i) the Net Income (or loss) of any Person  acquired  in a pooling of
interests  transaction for any period prior to the date of such  acquisition and
(ii) any net gain (but not loss)  resulting  from an Asset Sale by the Person in
question  or any of its  Subsidiaries  other  than  in the  ordinary  course  of
business  shall be  excluded  and (d)  extraordinary  gains and losses  shall be
excluded.
<PAGE>

     "Consolidated  Net Worth" means,  with respect to any Person at any date of
determination,  the consolidated  stockholders' equity represented by the shares
of such Person's Capital Stock (other than  Disqualified  Stock)  outstanding at
such date, as determined on a consolidated basis in accordance with GAAP.

     "Credit Facilities" means (i) the revolving credit facility as in effect as
of the Issue Date between  MagCorp and Congress  Financial  Corporation and (ii)
the  revolving  credit  facility as in effect as of the Issue Date between Sabel
and Congress Financial Corporation,  in each case as the same may at any time be
amended, amended and restated, supplemented or otherwise modified, including any
refinancing, refunding, replacement or extension thereof and whether by the same
or any other lender or group of lenders.

     "Custodian" has the meaning provided in Section 6.1(b).

     "Default"  means any event  that is, or after  notice or passage of time or
both would be, an Event of Default.

     "Depository"  means,  with respect to the Securities  issued in the form of
one or more  Book-Entry  Securities,  The  Depository  Trust  Company or another
person designated as Depository by the Company,  which must be a clearing agency
registered under the Exchange Act.

     "Disqualified  Stock" means, with respect to any Person,  any Capital Stock
of such Person  which,  by its terms (or by the terms of any security into which
it is convertible or for which it is exchangeable), or upon the happening of any
event,  matures  or  is  mandatorily  redeemable,  pursuant  to a  sinking  fund
obligation or otherwise,  or is exchangeable for Indebtedness,  or is redeemable
at the option of the  holder  thereof,  in whole or in part,  in each case on or
prior to the final Maturity Date of the Securities.

     "Event of Default" has the meaning provided in Section 6.1.

     "Exchange  Act" means the  Securities  Exchange Act of 1934, as amended and
the rules and regulations promulgated thereunder.

     "Existing Notes" means the 12% Senior Notes Due 2000 issued,  authenticated
and  delivered  under  the  indenture,  dated as of August  1,  1993,  among the
Company, the Guarantors and the Trustee, as amended or supplemented from time to
time pursuant to the terms of such indenture.

     "Fair  Market  Value" or "fair value"  means,  with respect to any asset or
property,  the price which could be  negotiated  in an arm's  length free market
transaction,  for cash, between a willing seller and a willing buyer, neither of
whom is under undue  pressure or  compulsion to complete the  transaction.  Fair
Market Value shall be determined by the Board of Directors of the Company acting
in good faith and shall be  evidenced  by a Board  Resolution  delivered  to the
Trustee.
<PAGE>

     "Fixed Charge Coverage Ratio" means, with respect to any Person,  the ratio
of (i)  Consolidated  Cash Flow of such Person for the four full fiscal quarters
for which financial  statements are available that immediately  precede the date
of the transaction or other  circumstances  giving rise to the need to calculate
the Fixed Charge  Coverage Ratio (the  "Transaction  Date") to (ii) all cash and
non-cash interest expense  (including  capitalized  interest) of such Person and
its Subsidiaries  determined in accordance with GAAP (net of any interest income
of such Person and its Subsidiaries and exclusive of deferred  financing fees of
such Person and its  Subsidiaries) and the aggregate amount of cash dividends or
other distributions  declared or paid on Capital Stock (other than Common Stock)
of such  Person  and its  Subsidiaries,  in each case for such four full  fiscal
quarter period. For purposes of this definition,  if the Transaction Date occurs
prior to the date on which the Company's  consolidated  financial statements for
the four full fiscal quarters  subsequent to the Issue Date are first available,
then  "Consolidated Cash Flow" and the items referred to in the preceding clause
(ii) shall be calculated,  in the case of the Company,  after giving effect on a
pro forma basis as if the Securities  outstanding on the  Transaction  Date were
issued on the first day of such four full fiscal quarter period.  In addition to
and without  limitation  of the foregoing  two  sentences,  for purposes of this
definition,  "Consolidated Cash Flow" and the items referred to in the preceding
clause (ii) shall be calculated after giving effect on a pro forma basis for the
period  of  such   calculation  to  (i)  the  Incurrence  or  repayment  of  any
Indebtedness of such Person or any of its Subsidiaries  (other than Indebtedness
for working capital) at any time during the period (the "Reference  Period") (A)
commencing  on the first day of the four full  fiscal  quarter  period for which
financial  statements are available that precedes the  Transaction  Date and (B)
ending on and including the Transaction Date, including, without limitation, the
Incurrence or repayment of the Indebtedness giving rise to the need to make such
calculation, as if such Incurrence or repayment occurred on the first day of the
Reference  Period;  provided  that if  such  Person  or any of its  Subsidiaries
directly or indirectly  guarantees  Indebtedness  of a third  Person,  the above
clause shall give effect to the Incurrence of such guaranteed Indebtedness as if
such Person or Subsidiary had directly Incurred such guaranteed Indebtedness and
(ii) any Asset Sales or Asset Acquisitions (including,  without limitation,  any
Asset  Acquisition  giving rise to the need to make such calculation as a result
of the Company or any of its  Subsidiaries  (including  any Person who becomes a
Subsidiary   as  a  result  of  the  Asset   Acquisition)   incurring   Acquired
Indebtedness)  occurring  during  the  Reference  Period and any  retirement  of
Indebtedness in connection with such Asset Sales, as if such Asset Sale or Asset
Acquisition and/or retirement occurred on the first day of the Reference Period.
Furthermore,  in  calculating  the  denominator  (but not the numerator) of this
"Fixed  Charge  Coverage  Ratio," (1)  subject to clause (3) below,  interest on
Indebtedness  determined on a fluctuating  basis as of the Transaction  Date and
which will continue to be so determined  thereafter shall be deemed to accrue at
a fixed rate per annum  equal to the rate of interest  on such  Indebtedness  in
effect on the  Transaction  Date; (2) if interest on any  Indebtedness  actually
incurred on the  Transaction  Date may  optionally  be determined at an interest
rate based upon a factor of a prime or similar  rate, a  eurocurrency  interbank
offered  rate,  or other rates,  then the interest rate based upon a factor of a
prime  or  similar  rate  shall  be  deemed  to  have  been in  effect;  and (3)
notwithstanding  clause (1) above,  interest  on  Indebtedness  determined  on a
fluctuating basis, to the extent such interest is covered by agreements relating
to Interest Rate Protection  Obligations,  shall be deemed to accrue at the rate
per annum resulting after giving effect to the operation of such agreements.
<PAGE>

     "GAAP" means  generally  accepted  accounting  principles  in effect on the
Issue  Date set  forth in the  opinions  and  pronouncements  of the  Accounting
Principles Board of the American  Institute of Certified Public  Accountants and
statements and pronouncements of the Financial  Accounting Standards Board or in
such other  statements  by such other entity as may be approved by a significant
segment of the accounting profession of the United States.

     "Global  Security"  means  a  Security  evidencing  all  or a  part  of the
Securities to be issued as Book-Entry  Securities,  issued to the  Depository in
accordance with Section 2.2 and bearing the legend prescribed in Exhibit B.

     "Guarantee" means the full and unconditional,  joint and several, guarantee
of the Securities by each Guarantor set forth in Article X.

     "Guarantor"  means (i) each of the Company's  Subsidiaries  executing  this
Indenture and (ii) each of the Company's  Subsidiaries which becomes a guarantor
of the Securities pursuant to Section 4.19.

     "Holder" or  "Securityholder"  means the Person in whose name a Security is
registered on the Registrar's books.

     "Incur" means, with respect to any Indebtedness,  to incur, create,  issue,
assume,  guarantee or otherwise become liable for or with respect to the payment
of,  contingently  or otherwise,  such  Indebtedness;  provided that neither the
accrual of interest  nor the  accretion  of  original  issue  discount  shall be
considered an Incurrence of Indebtedness.

     "Indebtedness" means, with respect to any Person, without duplication,  (i)
any  liability,  contingent or otherwise,  of such Person (A) for borrowed money
(whether or not the recourse of the lender is to the whole of the assets of such
Person or only to a portion  thereof),  (B)  evidenced  by a note,  debenture or
similar  instrument,  letter of credit or draft  accepted  (including a purchase
money obligation)  representing extensions of credit whether or not representing
obligations  for  borrowed  money or (C) for the payment of money  relating to a
Capitalized  Lease  Obligation  or other  obligation  relating  to the  deferred
purchase  price of any  property  or services  (other than  property or services
purchased on ordinary trade terms therefor) which purchase price is payable over
a period in excess of six months or is evidenced  by a note,  invoice or similar
written  instrument with a maturity in excess of six months;  (ii) any liability
of others of the kind described in the preceding clause (i) which the Person has
guaranteed  or which is  otherwise  its legal  liability;  (iii) any  obligation
secured by a lien to which the  property or assets of such  Person are  subject,
whether or not the  obligations  secured  thereby  shall have been assumed by or
shall  otherwise  be  such  Person's  legal  liability;  and  (iv)  any  and all
deferrals, renewals, extensions, replacements,  refinancings, and refundings of,
or  amendments,  modifications  or  supplements  to, any  liability  of the kind
described in any of the preceding clause (i), (ii) or (iii).

<PAGE>

     "Indenture"  means this Indenture as amended or  supplemented  from time to
time pursuant to the terms hereof.

     "interest," when used with respect to any Security, means the amount of all
interest accruing on such Security,  including all interest accruing  subsequent
to the occurrence of any events specified in Sections  6.1(a)(vii) and (viii) or
which would have accrued but for any such event.

     "Interest Payment Date," when used with respect to any Security,  means the
stated maturity of an installment of interest specified in such Security.

     "Interest Rate," when used with respect to any Security, means the rate per
annum  specified  in such  Security  as the  rate of  interest  accruing  on the
principal amount of such Security.

     "Interest Rate Protection  Obligations" means the obligations of any Person
pursuant  to  any  arrangement  with  any  other  Person  whereby,  directly  or
indirectly,  such  Person is  entitled  to  receive  from time to time  periodic
payments calculated by applying either a floating or a fixed rate of interest on
a stated notional  amount in exchange for periodic  payments made by such Person
calculated  by  applying  a fixed or a  floating  rate of  interest  on the same
notional  amount and shall  include,  without  limitation,  interest rate swaps,
caps, floors, collars and similar agreements.

     "Investment" has the meaning provided in Section 4.20.

     "Issue Date" means the date on which the Securities were originally  issued
in accordance with the terms of this Indenture.

     "Legal Holiday" means any day other than a Business Day.

     "Lien" means any  mortgage,  lien  (statutory or other),  pledge,  security
interest, encumbrance,  hypothecation, assignment for security or other security
agreement of any kind or nature  whatsoever.  For purposes of this Indenture,  a
Person  shall be  deemed  to own  subject  to a Lien any  property  which it has
acquired  or holds  subject  to the  interest  of a vendor or  lessor  under any
conditional  sale agreement,  capital lease or other title  retention  agreement
relating to such Person.

     "Maturity  Date," when used with  respect to any  Security,  means the date
specified  in such  Security  as the fixed date on which the  principal  of such
Security is due and payable.
<PAGE>

     "Net Cash  Proceeds"  means,  with respect to any Asset Sale,  the proceeds
thereof in the form of cash or Cash Equivalents,  including  payments in respect
of  deferred  payment  obligations  when  received  in the  form of cash or Cash
Equivalents  (except  to the  extent  that  such  obligations  with  respect  to
Indebtedness  are  financed  or sold with  recourse to the Company or any of its
Subsidiaries),  net of (i) brokerage  commissions and other  reasonable fees and
expenses (including fees and expenses of counsel and investment bankers) related
to such Asset Sale;  (ii)  provisions  for all taxes payable as a result of such
Asset Sale;  (iii)  payments made to retire  Indebtedness  secured by the assets
subject to such Asset Sale  (including  retirements  of  Indebtedness  under the
Credit  Facilities)  to the  extent  required  pursuant  to the  terms  of  such
Indebtedness;  and (iv) appropriate amounts to be provided by the Company or any
of its Subsidiaries,  as the case may be, as a reserve, in accordance with GAAP,
against  any  liabilities  associated  with such Asset Sale and  retained by the
Company or any of its  Subsidiaries,  as the case may be, after such Asset Sale,
including,  without  limitation,   pension  and  other  post-employment  benefit
liabilities,  liabilities related to environmental matters and liabilities under
any indemnification obligations associated with such Asset Sale.

     "Net  Income"  means,  with  respect to any Person for any period,  the net
income (loss) of such Person determined in accordance with GAAP.

     "Net  Proceeds"  means (a) in the case of any sale of Capital  Stock (other
than Disqualified Stock) by the Company,  the aggregate net proceeds received by
the Company,  after  payment of expenses,  commissions  and the like incurred in
connection  therewith,  whether such proceeds are in cash or in property (valued
at the Fair Market Value  thereof,  as  determined in good faith by the Board of
Directors  of the  Company,  at the  time of  receipt),  (b) in the  case of any
exchange,  exercise,  conversion or surrender of  outstanding  securities of any
kind of the Company for or into shares of Capital  Stock of the Company which is
not Disqualified Stock, the net book value of such outstanding securities on the
date of such exchange,  exercise,  conversion or surrender  (plus any additional
amount  required  to be paid by the holder to the  Company  upon such  exchange,
exercise,  conversion  or  surrender,  less  any  and all  payments  made to the
holders,  e.g., on account of fractional  shares, and less all expenses incurred
by the Company in connection  therewith)  and (c) in the case of the issuance of
any Indebtedness by the Company, the aggregate net cash proceeds received by the
Company, after payment of expenses, commissions and the like incurred therewith.

     "Officer" means the Chairman,  the President,  the Chief Executive Officer,
any Vice President, the Chief Financial Officer, the Treasurer, the Secretary or
the Controller of the Company or a Guarantor, as the case may be.

     "Officers' Certificate" means a certificate signed by two Officers or by an
Officer and an Assistant  Treasurer  or Assistant  Secretary of the Company or a
Guarantor, as the case may be.

     "Opinion of Counsel"  means a written  opinion  from legal  counsel both of
which are acceptable to the Trustee, which may include counsel to the Company or
a Guarantor, as the case may be.

     "Paying Agent" has the meaning provided in Section 2.3.
<PAGE>

     "Permitted  Liens" means,  with respect to any Person,  any lien arising by
reason of (a) any attachment, judgment, decree or order of any court, so long as
such lien is being  contested in good faith and is either  adequately  bonded or
execution thereon has been stayed pending appeal or review,  and any appropriate
legal  proceedings  which may have been duly  initiated  for the  review of such
attachment,  judgment, decree or order shall not have been finally terminated or
the  period  within  which  such  proceedings  may be  initiated  shall not have
expired;  (b) taxes,  assessments or governmental  charges not yet delinquent or
which are being  contested  in good faith;  (c) security for payment of workers'
compensation  or other  insurance;  (d) security for the performance of tenders,
bids, leases and contracts (other than contracts for the payment of money);  (e)
deposits  to secure  public  or  statutory  obligations  or in lieu of surety or
appeal bonds or to secure  permitted  contracts  for the purchase or sale of any
currency  entered into in the ordinary course of business;  (f) operation of law
in favor of carriers, warehousemen, landlords, mechanics, materialmen, laborers,
employees or  suppliers,  incurred in the  ordinary  course of business for sums
which  are  not  yet  delinquent  or  are  being  contested  in  good  faith  by
negotiations or by appropriate proceedings which suspend the collection thereof;
(g) any interest or title of a lessor  under any lease;  (h) security for surety
or appeal bonds; and (i) easements,  rights-of-way, zoning and similar covenants
and restrictions  and other similar  encumbrances or title defects which, in the
aggregate, are not substantial in amount and which do not in any case materially
interfere with the ordinary conduct of the business of the Company or any of its
Subsidiaries.

     "Person" means any  individual,  corporation,  partnership,  joint venture,
trust,  unincorporated  organization  or  government  or any agency or political
subdivision thereof.

     "principal" of a debt security  means the principal  amount of the security
plus, when appropriate, the premium, if any, on the security.

     "Public Equity Offering" has the meaning provided in Section 3.1.

     "Redemption Date" means, with respect to any Security, the Maturity Date of
such  Security  or the date on which  such  Security  is to be  redeemed  by the
Company pursuant to Section 3.1.

     "Registrar" has the meaning provided in Section 2.3.

     "Renco" means The Renco Group,  Inc., a New York corporation and the parent
of the Company.

     "Required Filing Date" has the meaning provided in Section 4.8.

     "Restricted  Payment"  means any of the following:  (i) the  declaration or
payment  of any  dividend  or any other  distribution  on  Capital  Stock of the
Company or any  Subsidiary  of the Company or any payment  made to the direct or
indirect  holders (in their  capacities as such) of Capital Stock of the Company
or any  Subsidiary  of the Company  (other than (x)  dividends or  distributions
payable solely in Capital Stock (other than  Disqualified  Stock) or in options,
warrants or other  rights to purchase  Capital  Stock  (other than  Disqualified
Stock),  and (y) in the  case  of  Subsidiaries  of the  Company,  dividends  or
distributions  payable to the Company or to a Subsidiary of the  Company),  (ii)
the purchase,  redemption or other  acquisition  or retirement  for value of any
Capital Stock of the Company or any of its Subsidiaries, (iii) the making of any
principal  payment on, or the purchase,  defeasance,  repurchase,  redemption or
other  acquisition  or retirement  for value,  prior to any scheduled  maturity,
scheduled  repayment or scheduled  sinking fund  payment,  of, any  Indebtedness
which  is  subordinated  in right  of  payment  to the  Securities  (other  than
Indebtedness  acquired in anticipation of satisfying a sinking fund  obligation,
principal installment or final maturity, in each case due within one year of the
date of  acquisition)  and (iv) the making of any Investment in any Person other
than pursuant to clauses (i) through (vii) of Section 4.20.


<PAGE>

     "Sale-Leaseback   Transaction"   means  any  arrangement  with  any  Person
providing for the leasing by the Company or any Subsidiary of the Company of any
real or tangible personal property,  which property has been or is to be sold or
transferred by the Company or such Subsidiary to such Person in contemplation of
such leasing.

     "SEC" means the Securities and Exchange Commission.

     "Securities" means the 11-1/2% Senior Notes due 2003, issued, authenticated
and delivered under this Indenture, as amended or supplemented from time to time
pursuant to the terms of this Indenture.

     "Securities  Act" means the  Securities  Act of 1933,  as amended,  and the
rules and regulations promulgated thereunder.

     "Subsidiary"  means,  with respect to any Person,  (i) any  corporation  of
which the  outstanding  Capital  Stock  having at least a majority  of the votes
entitled  to be cast in the  election of  directors  shall at the time be owned,
directly or  indirectly,  by such Person,  by a Subsidiary  of such Person or by
such Person and a  Subsidiary  of such Person,  or (ii) any other Person  (other
than a  corporation)  of which at least a majority of voting  interest is at the
time,  directly or  indirectly,  owned by such Person,  by a Subsidiary  of such
Person or by such Person and a Subsidiary of such Person.

     "TIA"  means  the  Trust  Indenture  Act of 1939  (15  U.S.  Code  Sections
77aaa-77bbbb),  as amended  by the Trust  Indenture  Reform  Act of 1990,  as in
effect on the date of this Indenture.

     "Trustee" means the party named as such in this Indenture until a successor
replaces it in accordance  with the  provisions of this Indenture and thereafter
means such successor.

     "Trust  Officer"  means an officer  or  assistant  officer  of the  Trustee
assigned  to  the  Corporate  Trustee   Administration   Department  or  similar
department  performing corporate trust work, or any successor to such department
or, in the case of a successor  trustee,  an officer assigned to the department,
division or group performing the corporate trust work of such successor and also
means with respect to any particular corporate trust matter any other officer of
the  Trustee to whom such  matter is referred  because of his  knowledge  of and
familiarity with the particular subject.

     "U.S. Government Obligations" has the meaning provided in Section 8.1(b).

     "Wholly-Owned  Subsidiary"  means  any  Subsidiary  all of the  outstanding
Capital  Stock of which  (other  than  directors'  qualifying  shares) is owned,
directly or indirectly, by the Company.
<PAGE>

     SECTION 1.2  Incorporation by Reference of Trust Indenture Act.
                  -------------------------------------------------

     Whenever  this  Indenture  refers to a provision of the TIA, the  provision
shall be deemed  incorporated by reference in and made a part of this Indenture.
The following TIA terms used in this Indenture have the following meanings:

          (a) "Commission" means the SEC;

          (b) "indenture securities" means the Securities;

          (c) "indenture security holder" means a Holder or Securityholder;

          (d) "indenture to be qualified" means this Indenture;

          (e) "indenture trustee" or "institutional  trustee" means the Trustee;
     and

          (f)  "obligor" on the indenture  securities  means the Company and the
     Guarantors or any other obligor on the Securities.

     All other TIA terms  used in this  Indenture  that are  defined by the TIA,
defined  by TIA  reference  to  another  statute  or defined by SEC rule and not
otherwise defined herein have the meanings so assigned to them therein.

     SECTION 1.3  Rules of Construction.
                  ---------------------

     Unless the context otherwise requires:

               (a) a term has the meaning assigned to it;

               (b) "or" is exclusive;

               (c) words in the  singular  include the plural,  and words in the
          plural include the singular;

               (d) "herein," "hereof" and other words of similar import refer to
          this Indenture as a whole and not to any particular  Article,  Section
          or other Subdivision; and

               (e) unless otherwise  specified herein, all accounting terms used
          herein shall be interpreted,  all accounting  determinations hereunder
          shall be made, and all financial  statements  required to be delivered
          hereunder  shall be prepared in accordance with GAAP as in effect from
          time to time,  applied  on a basis  consistent  with  the most  recent
          audited consolidated financial statements of the Company.
<PAGE>

                                   ARTICLE II

                                 THE SECURITIES
                                 --------------

     SECTION 2.1  Form and Dating.
                  ---------------

     The  Securities  and the  Trustee's  certificates  of  authentication  with
respect  thereto  shall be  substantially  in the form set  forth in  Exhibit  A
annexed  hereto,  which is hereby  incorporated  in and expressly made a part of
this  Indenture.  The Securities  may have  notations,  legends or  endorsements
required by law, rule,  usage or agreement to which the Company or any Guarantor
is subject.  Each Security  shall be dated the date of its  authentication.  The
terms and  provisions  contained in the  Securities  shall  constitute,  and are
expressly made, a part of this Indenture.

     SECTION 2.2  Execution and Authentication.
                  ----------------------------

     Two  Officers  shall  execute  the  Securities  on behalf of the Company by
either manual or facsimile  signature.  The  Company's  seal shall be impressed,
affixed, imprinted or reproduced on the Securities.

     If an Officer whose  signature is on a Security no longer holds that office
at the time the Trustee  authenticates  the Security or at any time  thereafter,
the Security shall be valid nevertheless.

     A Security shall not be valid until an authorized  signatory of the Trustee
manually signs the certificate of authentication on the Security. Such signature
shall be conclusive evidence that the Security has been authenticated under this
Indenture.

     The  Trustee  shall  authenticate  Securities  for  original  issue  in  an
aggregate  principal  amount  not to exceed  $150,000,000,  upon  receipt  of an
Officers'   Certificate   signed  by  two  Officers  directing  the  Trustee  to
authenticate the Securities and certifying that all conditions  precedent to the
issuance  of the  Securities  contained  herein  have been  complied  with.  The
aggregate principal amount of Securities  outstanding at any time may not exceed
$150,000,000 except as provided in Section 2.7.

     The Trustee may appoint an  authenticating  agent acceptable to the Company
to authenticate Securities.  Unless limited by the terms of such appointment, an
authenticating agent may authenticate Securities whenever the Trustee may do so.
Each  reference in this  Indenture  to  authentication  by the Trustee  includes
authentication  by such  agent.  Such  authenticating  agent shall have the same
rights as the  Trustee in any  dealings  hereunder  with the Company or with any
Affiliate of the Company.

     If the  Securities  are to be  issued  in the  form of one or  more  Global
Securities,  then the Company shall  execute and the Trustee shall  authenticate
and deliver one or more Global  Securities that (i) shall represent and shall be
in minimum  denominations of $1,000, (ii) shall be registered in the name of the
Depository  for such  Global  Security  or  Securities  or the  nominee  of such
Depository,  (iii)  shall be  delivered  by the  Trustee to such  Depository  or
pursuant to such  Depository's  instructions  and (iv) shall bear the legend set
forth in Exhibit B.
<PAGE>

     SECTION 2.3  Registrar and Paying Agent.
                  --------------------------

     The Company  shall  maintain an office or agency (which shall be located in
the  Borough  of  Manhattan  in the City of New York,  State of New York)  where
Securities  may be presented for  registration  of transfer or for exchange (the
"Registrar"),  an office or agency  (which  shall be located  in the  Borough of
Manhattan,  the City of New York,  State of New York)  where  Securities  may be
presented for payment (the "Paying Agent") and an office or agency where notices
and  demands  to or upon the  Company  in  respect  of the  Securities  and this
Indenture may be served.  The Registrar  shall keep a register of the Securities
and of their transfer and exchange.  The Company may have one or more additional
paying  agents.  The term "Paying Agent"  includes any additional  paying agent.
None of the  Company,  any  Guarantor  or any  Affiliate  of the  Company or any
Guarantor may act as Paying Agent.

     The Company shall enter into an appropriate agency agreement with any Agent
not a party to this  Indenture,  which shall  incorporate  the provisions of the
TIA. The agreement  shall implement the provisions of this Indenture that relate
to such Agent.  The Company  shall notify the Trustee in writing of the name and
address of any such  Agent.  If the Company  fails to  maintain a  Registrar  or
Paying Agent,  or fails to give the foregoing  notice,  the Trustee shall act as
such and shall be  entitled  to  appropriate  compensation  in  accordance  with
Section 7.7.

     The Company initially  appoints the Trustee as Registrar,  Paying Agent and
agent for service of notices and demands in connection with the Securities.

     SECTION 2.4  Paying Agent To Hold Money in Trust.
                  -----------------------------------

     Each   Paying   Agent   shall  hold  in  trust  for  the   benefit  of  the
Securityholders  or the  Trustee  all  money  held by the  Paying  Agent for the
payment of principal of or interest on the  Securities  (whether  such money has
been paid to it by the Company or any other obligor on the Securities),  and the
Company  and the Paying  Agent  shall  notify the  Trustee of any default by the
Company (or any other  obligor on the  Securities)  in making any such  payment.
Money  held in trust  by the  Paying  Agent  need not be  segregated  except  as
required  by law and in no  event  shall  the  Paying  Agent be  liable  for any
interest  on any money  received  by it  hereunder.  The Company at any time may
require the Paying  Agent to pay all money held by it to the Trustee and account
for any funds  disbursed and the Trustee may at any time during the  continuance
of any Event of Default  specified in Section  6.1(a)(i)  or (ii),  upon written
request to the Paying  Agent,  require  such Paying Agent to pay  forthwith  all
money so held by it to the Trustee and to account for any funds disbursed.  Upon
making such  payment,  the Paying Agent shall have no further  liability for the
money delivered to the Trustee.

     SECTION 2.5  Securityholder Lists.
                  --------------------

     The  Trustee  shall  preserve  in  as  current  a  form  as  is  reasonably
practicable  the most recent list  available to it of the names and addresses of
the  Securityholders.  If the Trustee is not the  Registrar,  the Company  shall
furnish to the Trustee at least five Business Days before each Interest  Payment
Date,  and at such other times as the Trustee may request in writing,  a list in
such form and as of such date as the Trustee may reasonably require of the names
and addresses of the Securityholders.
<PAGE>

     SECTION 2.6  Transfer and Exchange.
                  ---------------------

     When Securities in certificated  form are presented to the Registrar with a
request  from the Holder of such  Securities  to  register  the  transfer  or to
exchange them for an equal  principal  amount of Securities of other  authorized
denominations, the Registrar shall register the transfer or make the exchange as
requested;   provided  that  every  Security   presented  or   surrendered   for
registration of transfer or exchange shall be duly endorsed or be accompanied by
a written  instrument  of transfer in form  satisfactory  to the Company and the
Registrar,  duly executed by the Holder thereof or his attorneys duly authorized
in writing.  To permit  registrations  of transfers and  exchanges,  the Company
shall issue and  execute,  and the Trustee  shall  authenticate  new  Securities
evidencing  such  transfer or exchange at the  Registrar's  request.  No service
charge shall be made to the  Securityholder  for any registration of transfer or
exchange.  The  Company  may require  from the  Securityholder  payment of a sum
sufficient to cover any transfer taxes or other governmental  charge that may be
imposed in relation  to a transfer or  exchange,  but this  provision  shall not
apply to any exchange pursuant to Section 2.10, 3.7, 4.13, 4.15 or 9.5 (in which
events the  Company  will be  responsible  for the payment of such  taxes).  The
Trustee shall not be required to exchange or register a transfer of any Security
for a period of 15 days  immediately  preceding  the first  mailing of notice of
redemption of Securities to be redeemed or of any Security  selected,  called or
being called for  redemption  except,  in the case of any Security  where public
notice has been given that such Security is to be redeemed in part,  the portion
thereof not to be redeemed.

     In accordance  with the  provisions of the Indenture and subject to certain
limitations  herein set forth,  an owner of a  beneficial  interest  in a Global
Security may request a Security in certificated form, in exchange in whole or in
part,  as the case may be, for such  beneficial  owner's  interest in the Global
Security.

     Upon any exchange  provided  for in the  preceding  paragraph,  the Company
shall  execute  and the  Trustee  shall  authenticate  and deliver to the person
specified  by the  Depository a new Security or  Securities  registered  in such
names and in such authorized  denominations  as the Depository,  pursuant to the
instructions of the beneficial owner of the Securities  requesting the exchange,
shall instruct the Trustee.  Thereupon,  the beneficial ownership of such Global
Security shown on the records  maintained by the Depository or its nominee shall
be reduced by the amounts so exchanged and an appropriate  endorsement  shall be
made by or on behalf of the Trustee on the Global Security.

     Any such exchange  shall be effected  through the  Depository in accordance
with the procedures of the Depository therefor.
<PAGE>

     Notwithstanding  the foregoing,  no Global Security shall be registered for
transfer or exchange,  or authenticated and delivered,  whether pursuant to this
Section,  Section 2.7, 2.10 or 3.7 or  otherwise,  in the name of a person other
than the  Depository  for such  Global  Security  or its  nominee  until (i) the
Depository  notifies  the Company  that it is unwilling or unable to continue as
Depository for such Global  Security or if at any time the Depository  ceases to
be a  clearing  agency  registered  under  the  Exchange  Act,  and a  successor
depository  is not  appointed  by the Company  within 30 days,  (ii) the Company
executes  and  delivers  to the  Trustee a Company  order  that all such  Global
Securities  shall be  exchangeable  or (iii)  there shall have  occurred  and be
continuing  an Event of Default.  Upon the  occurrence  in respect of any Global
Security  representing  the  Securities  of any one or  more  of the  conditions
specified in clause (i),  (ii) or (iii) of the preceding  sentence,  such Global
Security may be registered for transfer or exchange for Securities registered in
the names of, authenticated and delivered to, such persons as the Trustee or the
Depository, as the case may be, shall direct.

     Except as provided  above,  any Security  authenticated  and delivered upon
registration  of  transfer  of, or in  exchange  for,  or in lieu of, any Global
Security,  whether  pursuant  to  this  Section,  Section  2.7,  2.10  or 3.7 or
otherwise,  shall also be a Global  Security  and bear the legend  specified  in
Exhibit B.

     SECTION 2.7  Replacement Securities.
                  ----------------------

     If a mutilated  Security is  surrendered to the Registrar or the Trustee or
if the Holder of a Security claims that the Security has been lost, destroyed or
wrongfully  taken, the Company shall issue and the Trustee shall  authenticate a
replacement Security if the Holder of such Security furnishes to the Company and
to the Trustee evidence  reasonably  acceptable to them of the ownership and the
destruction,  loss or theft of such Security.  If required by the Trustee or the
Company,  an indemnity bond shall be posted,  sufficient in the judgment of both
to protect the  Company,  the Trustee or any Paying Agent from any loss that any
of them may suffer if such  Security  is  replaced.  The Company may charge such
Holder for the Company's expenses in replacing such Security and the Trustee may
charge the Company for the Trustee's expenses in replacing such Security.  Every
replacement Security shall constitute an additional obligation of the Company.

     SECTION 2.8  Outstanding Securities.
                  ----------------------

     The Securities  outstanding  at any time are all Securities  that have been
authenticated  by the Trustee  except for (a) those  cancelled  by it, (b) those
delivered  to it for  cancellation,  (c) to the extent set forth in Sections 8.1
and 8.2, on or after the date on which the  conditions  set forth in Section 8.1
or 8.2 have been  satisfied,  those  Securities  theretofore  authenticated  and
delivered by the Trustee  hereunder and (d) those  described in this Section 2.8
as not  outstanding.  A Security  does not cease to be  outstanding  because the
Company or one of its Affiliates holds the Security.
<PAGE>

     If a  Security  is  replaced  pursuant  to  Section  2.7,  it  ceases to be
outstanding  unless  the  Trustee  receives  proof  satisfactory  to it that the
replaced  Security is held by a bona fide purchaser in whose hands such Security
is a legal, valid and binding obligation of the Company.

     If the Paying Agent holds, in its capacity as such, on any Maturity Date or
on any optional  redemption  date,  money sufficient to pay all accrued interest
and principal  with respect to such  Securities  payable on that date and is not
prohibited from paying such money to the Holders  thereof  pursuant to the terms
of this  Indenture,  then on and after  that date  such  Securities  cease to be
outstanding and interest on them ceases to accrue.

     SECTION 2.9  Treasury Securities.
                  -------------------

     In  determining  whether the Holders of the  required  principal  amount of
Securities  have  concurred  in any  declaration  of  acceleration  or notice of
default or direction, waiver or consent or any amendment,  modification or other
change to this Indenture,  Securities owned by the Company,  any Guarantor or an
Affiliate of the Company or any Guarantor  shall be  disregarded  as though they
were not  outstanding,  except that for the purposes of determining  whether the
Trustee shall be protected in relying on any such  direction,  waiver or consent
or  any  amendment,  modification  or  other  change  to  this  Indenture,  only
Securities  as to which a Trust  Officer of the Trustee  receives  an  Officers'
Certificate stating that such Securities are so owned shall be so disregarded.

     SECTION 2.10  Temporary Securities.
                   --------------------

     Until  definitive  Securities  are  prepared  and ready for  delivery,  the
Company may prepare and the Trustee  shall  authenticate  temporary  Securities.
Temporary Securities shall be substantially in the form of definitive Securities
but may have  variations  that the Company  considers  appropriate for temporary
Securities.  Without  unreasonable  delay,  the  Company  shall  prepare and the
Trustee  shall  authenticate  definitive  Securities  in exchange for  temporary
Securities.  Until such exchange,  temporary Securities shall be entitled to the
same rights, benefits and privileges as definitive Securities.

     SECTION 2.11  Cancellation.
                   ------------

     The  Company  at  any  time  may  deliver  Securities  to the  Trustee  for
cancellation.  The  Registrar  and the Paying Agent shall forward to the Trustee
any Securities  surrendered to them for  registration  of transfer,  exchange or
payment. The Trustee shall cancel all Securities surrendered for registration of
transfer,  exchange, payment,  replacement or cancellation and shall (subject to
the  record-retention  requirements  of the  Exchange  Act) dispose of cancelled
Securities  unless the  Company in writing  directs  the  Trustee to return such
Securities to the Company,  and, if so disposed,  shall deliver a certificate of
disposition  thereof to the Company.  The Company may not reissue or resell,  or
issue new  Securities  to replace,  Securities  that the Company has redeemed or
paid, or that have been delivered to the Trustee for cancellation.
<PAGE>

     SECTION 2.12  Defaulted Interest.
                   ------------------

     If the Company  defaults on a payment of  interest  on the  Securities,  it
shall pay the  defaulted  interest,  plus (to the extent  permitted  by law) any
interest payable on the defaulted interest, in accordance with the terms hereof,
to the Persons who are  Securityholders  on a  subsequent  special  record date,
which date shall be at least five Business  Days prior to the payment date.  The
Company  shall  fix  such  special  record  date  and  payment  date in a manner
satisfactory  to the Trustee.  At least 15 days before such special record date,
the  Company  shall mail to each  Securityholder  of such  series a notice  that
states the special  record  date,  the payment  date and the amount of defaulted
interest, and interest payable on such defaulted interest, if any, to be paid.

     SECTION 2.13  CUSIP Number.
                   ------------

     The Company in issuing the Securities may use a "CUSIP" number,  and if so,
such CUSIP  number shall be included in notices of  redemption  or exchange as a
convenience to Holders;  provided,  however, that any such notice may state that
no  representation is made as to the correctness or accuracy of the CUSIP number
printed in the notice or on the Securities, and that reliance may be placed only
on the other identification numbers printed on the Securities.  The Company will
promptly notify the Trustee of any change in the CUSIP number.

     SECTION 2.14  Deposit of Moneys.
                   -----------------

     Prior to 10:00 a.m., New York City time, on each Interest  Payment Date and
Maturity  Date,  the  Company  shall have  deposited  with the  Paying  Agent in
immediately  available funds money sufficient to make cash payments, if any, due
on such Interest  Payment Date or Maturity Date, as the case may be, in a timely
manner  which  permits  the  Trustee  to remit  payment  to the  Holders on such
Interest  Payment Date or Maturity  Date,  as the case may be. The principal and
interest on  Book-Entry  Securities  shall be payable to the  Depository  or its
nominee, as the case may be, as the sole registered owner and the sole holder of
the Book-Entry  Securities  represented  thereby.  The principal and interest on
Securities  in  certificated  form  shall be payable at the office of the Paying
Agent.

                                   ARTICLE III

                                   REDEMPTION
                                   ----------

     SECTION 3.1  Optional Redemption.
                  -------------------

     The Securities  will be subject to redemption,  in whole or in part, at the
option of the Company,  at any time on or after July 1, 2000, at the  redemption
prices  (expressed  as  percentages  of  principal  amount) set forth below plus
accrued  interest to the redemption date, if redeemed during the 12-month period
beginning on July 1 of the years indicated below:


<PAGE>

                   Year                                     Percentage
                   ----                                     ----------
                   2000.............................        105.750%
                   2001.............................        102.875%
                   2002.............................        100.000%

     In addition,  at any time prior to July 1, 1999,  the Company may redeem up
to 33% of the aggregate  principal  amount of the Securities  originally  issued
with the proceeds of one or more Public Equity Offerings (as defined below) at a
redemption price (expressed as a percentage of principal  amount) of 110.5% plus
accrued interest to the redemption  date;  provided that at least $100.0 million
aggregate principal amount of Securities remains  outstanding  immediately after
any such  redemption.  In order to  effect  the  foregoing  redemption  with the
proceeds of any Public Equity  Offering,  the Company shall make such redemption
not  more  than 120 days  after  the  consummation  of any  such  Public  Equity
Offering.  "Public Equity  Offering"  means an  underwritten  public offering of
Capital  Stock  (other  than  Disqualified  Stock)  pursuant  to a  registration
statement filed with the SEC in accordance with the Securities Act.

     SECTION 3.2  Notices to Trustee.
                  ------------------

     If the Company elects to redeem Securities  pursuant to Section 3.1 of this
Indenture and Paragraph 5 of the Securities, it shall notify the Trustee and the
Paying  Agent in  writing of the  Redemption  Date and the  principal  amount of
Securities to be redeemed.

     The Company  shall give each  notice  provided  for in this  Section 3.2 at
least 45 days  before the  Redemption  Date  (unless a shorter  notice  shall be
agreed to by the Trustee in writing),  together  with an  Officers'  Certificate
stating that such  redemption will comply with the conditions  contained  herein
and in the Securities.

     SECTION 3.3  Selection of Securities To Be Redeemed.
                  --------------------------------------

     If less than all of the  Securities  are to be  redeemed  at any time,  the
Trustee  shall  select the  Securities  to be  redeemed in  compliance  with the
requirements of the principal national securities exchange, if any, on which the
Securities  being  redeemed are listed or, if the Securities are not listed on a
national securities  exchange,  on a pro rata basis, by lot or by such method as
the  Trustee  shall  deem  fair and  appropriate.  The  Trustee  shall  make the
selection  from  the  Securities  outstanding  and  not  previously  called  for
redemption.  The Trustee  shall  promptly  notify the Company in writing of such
Securities  selected for redemption and, in the case of Securities  selected for
partial redemption,  the principal amount to be redeemed. The Trustee may select
for  redemption  portions  of the  principal  amount  of  Securities  that  have
denominations  larger than $1,000.  Securities  and portions of them the Trustee
selects  shall be in amounts of $1,000 or  integral  multiples  of $1,000.  If a
redemption is to be made with the proceeds of a Public Equity Offering  pursuant
to Section 3.1,  selection of the Securities for redemption shall be made by the
Trustee  only on a pro rata basis  unless such method is  otherwise  prohibited.
Provisions of this Indenture that apply to Securities called for redemption also
apply to portions of Securities called for redemption.


<PAGE>

     SECTION 3.4  Notice of Redemption.
                  --------------------

     At least 30 days but not more than 60 days before a  Redemption  Date,  the
Company  shall mail or cause the  mailing of, in the name of, at the request of,
and at the expense of the Company, a notice of redemption by first-class mail to
each  Holder of  Securities  to be redeemed  at its  registered  address and the
Trustee and any Paying Agent.

     The notice shall identify the Securities to be redeemed and shall state:

               (a)  the Redemption Date;

               (b)  the redemption price and the amount of accrued  interest, if
          any, to be paid;

               (c)  the name and address of the Paying Agent;

               (d)  that Securities called for redemption must be surrendered to
          the Paying Agent to collect the redemption price and accrued interest,
          if any;

               (e)  that, unless the Company  defaults in making the  redemption
          payment, interest on Securities called for redemption ceases to accrue
          on and after the Redemption  Date and the only remaining  right of the
          Holders of such Securities of such series is to receive payment of the
          redemption  price upon surrender to the Paying Agent of the Securities
          redeemed;

               (f)  if any  Security  is to be redeemed in part,  the portion of
          the  principal  amount  (equal  to  $1,000  or any  integral  multiple
          thereof) of such  Security to be  redeemed  and that,  on or after the
          Redemption  Date,  upon surrender of such Security,  a new Security or
          Securities  in  aggregate  principal  amount  equal to the  unredeemed
          portion thereof will be issued without charge to the Securityholder;

               (g)  if less than all of the  Securities are to be redeemed,  the
          identification of the particular Securities (or portion thereof) to be
          redeemed,  as well as the aggregate  principal amount of Securities to
          be redeemed and the aggregate principal amount of Securities estimated
          to be outstanding after such partial redemption; and

               (h)  the CUSIP number, if any, pursuant to Section 2.13.

     At the  Company's  written  request,  the Trustee  shall give the notice of
redemption in the Company's name and at the Company's expense.
<PAGE>

     SECTION 3.5  Effect of Notice of Redemption.
                  ------------------------------

     Once  notice of  redemption  is mailed,  Securities  called for  redemption
become due and payable on the Redemption Date and at the redemption  price. Upon
surrender to the Paying Agent,  such Securities  shall be paid at the redemption
price plus accrued  interest to the Redemption  Date, but interest  installments
whose  maturity  is on or prior to such  Redemption  Date will be payable on the
relevant  Interest  Payment  Dates to the  Holders  of  record  at the  close of
business on the relevant record dates referred to in the Securities.

     SECTION 3.6  Deposit of Redemption Price.
                  ---------------------------

     At least one Business Day prior to the  Redemption  Date, the Company shall
deposit with the Paying Agent in immediately available funds money sufficient to
pay the redemption  price of and accrued  interest on all Securities or portions
thereof to be redeemed on the Redemption Date.

     If any Security  surrendered  for redemption in the manner  provided in the
Securities shall not be so paid on the Redemption Date due to the failure of the
Company or any  Guarantor  to deposit  sufficient  funds with the Paying  Agent,
interest will continue to accrue from the Redemption  Date until such payment is
made on the unpaid principal and, to the extent lawful, on any interest not paid
on such unpaid principal, in each case at the date and in the manner provided in
the Securities.

     SECTION 3.7  Securities Redeemed in Part.
                  ---------------------------

     Upon  surrender to the Paying Agent of a Security that is redeemed in part,
the Company shall execute and the Trustee  shall  authenticate  for the Holder a
new  Security  (accompanied  by a notation  of  Guarantee  duly  endorsed by the
Guarantors) equal in principal amount to the unredeemed  portion of the Security
surrendered.

                                   ARTICLE IV


                                   COVENANTS
                                   ---------

     SECTION 4.1  Payment of Securities.
                  ---------------------

     The Company  shall pay the  principal of and interest on the  Securities on
the dates and in the manner provided in the Securities and this Indenture.

     An  installment  of principal or interest  shall be considered  paid on the
date due if the  Trustee  or the  Paying  Agent  holds on such date  immediately
available funds designated for and sufficient to pay such installment.

     The  Company  shall pay  interest on overdue  principal  and (to the extent
permitted by law) on overdue installments of interest at a rate equal to 13-1/2%
per annum.
<PAGE>

     SECTION 4.2  Maintenance of Office or Agency.
                  -------------------------------

     The Company  shall  maintain in the Borough of  Manhattan,  the City of New
York, an office or agency,  where Securities may be surrendered for registration
of transfer or exchange or for  presentation  for payment and where  notices and
demands to or upon the Company in respect of the  Securities  and this Indenture
may be served. The Company will give prompt written notice to the Trustee of the
location,  and any change in the location,  of such office or agency.  If at any
time the Company  shall fail to maintain any such  required  office or agency or
shall fail to furnish the Trustee with the address thereof,  such presentations,
surrenders,  notices  and  demands  may be made or served at the  address of the
Trustee set forth in Section 11.2.

     The Company may also from time to time  designate one or more other offices
or agencies where the Securities may be presented or surrendered  for any or all
such  purposes and may from time to time rescind  such  designations;  provided,
however,  that no such designation or rescission shall in any manner relieve the
Company of its  obligation  to  maintain  an office or agency in the  Borough of
Manhattan, the City of New York, for such purposes. The Company will give prompt
written  notice to the Trustee of any such  designation or rescission and of any
change in the location of any such other office or agency.

     The Company  hereby  initially  designates  Fleet  National Bank, c/o First
Chicago Trust Company,  14 Wall Street,  8th Floor,  Window No. 2, New York, New
York 10005, as an agency of the Company in accordance with Section 2.3.

     SECTION 4.3  Corporate Existence.
                  -------------------

     Subject to Article V, the Company  shall do or cause to be done, at its own
cost  and  expense,  all  things  necessary  to  and  will  cause  each  of  its
Subsidiaries  to,  preserve  and keep in full force and effect the  corporate or
partnership  existence  and rights  (charter  and  statutory),  licenses  and/or
franchises of the Company and each of its Subsidiaries;  provided, however, that
the Company or any of its  Subsidiaries  shall not be  required to preserve  any
such  rights,  licenses or  franchises  if the Board of Directors of the Company
shall reasonably  determine that the preservation thereof is no longer desirable
in the conduct of the  business of the Company or such  Subsidiary  and the loss
thereof is not adverse in any material respect to the Holders.

     SECTION 4.4  Payment of Taxes and Other Claims.
                  ---------------------------------

     The  Company  shall  pay or  discharge  or cause to be paid or  discharged,
before  the  same  shall  become  delinquent,  (a) all  taxes,  assessments  and
governmental  charges  levied or imposed upon its or its  Subsidiaries'  income,
profits or property and (b) all lawful claims for labor,  materials and supplies
which,  if  unpaid,  might by law  become a Lien  upon its  property;  provided,
however,  that the Company shall not be required to pay or discharge or cause to
be paid or discharged  any such tax,  assessment,  charge or claim whose amount,
applicability  or  validity  is being  contested  in good  faith by  appropriate
negotiations or proceedings and for which disputed amounts adequate reserves (in
the good faith  judgment of the Board of  Directors  of the  Company)  have been
made.
<PAGE>

     SECTION  4.5  Maintenance  of  Properties;  Insurance;
                   Books and  Records; Compliance with Law.
                   ---------------------------------------

     (a) The Company shall,  and shall cause each of its Subsidiaries to, at all
times cause all  properties  used or useful in the conduct of its business to be
maintained and kept in good condition, repair and working order (reasonable wear
and tear excepted) and supplied with all necessary equipment, and shall cause to
be  made  all  necessary  repairs,  renewals,   replacements,   betterments  and
improvements thereto.

     (b) The Company and each of its  Subsidiaries  shall maintain  insurance in
such amounts and covering such risks as are usually and customarily carried with
respect to similar facilities according to their respective locations.

     (c) The  Company  shall and shall  cause each of its  Subsidiaries  to keep
proper books of record and account,  in which full and correct  entries shall be
made of all  financial  transactions  and the assets and business of the Company
and each Subsidiary of the Company, in accordance with GAAP consistently applied
to the Company and each of its Subsidiaries taken as a whole.

     (d) The Company  shall and shall cause each of its  Subsidiaries  to comply
with all statutes,  laws,  ordinances,  or government  rules and  regulations to
which it is subject,  noncompliance with which would materially adversely affect
the business, prospects, earnings, properties, assets or condition (financial or
otherwise) of the Company and its Subsidiaries taken as a whole.

     SECTION 4.6  Guarantees.
                  ----------

     The Company shall at all times ensure that the  Guarantees  shall remain in
full force and effect and shall not be  subordinated  in right of payment to any
Indebtedness of the Guarantors.

     SECTION 4.7  Compliance Certificates.
                  -----------------------

     (a) The Company and each Guarantor shall deliver to the Trustee,  within 45
days after the end of each of the first three  quarters of the Company's  fiscal
year,  and  within  90  days  after  the  end of  such  fiscal  year,  Officers'
Certificates of the Company and each Guarantor  stating (i) that a review of the
activities  of the  Company or such  Guarantor,  as the case may be,  during the
preceding  fiscal  quarter or year,  as the case may be, has been made under the
supervision  of the  signing  Officers  with a view to  determining  whether the
Company or such Guarantor, as the case may be, has kept, observed, performed and
fulfilled  its  obligations  under this  Indenture,  and (ii) that,  to the best
knowledge  of  each  Officer  signing  such  certificate,  the  Company  or such
Guarantor, as the case may be, has kept, observed,  performed and fulfilled each
and every  covenant  contained  in this  Indenture  and is not in default in the
performance or observance of any of the terms,  provisions and conditions hereof
(or, if a Default or Event of Default shall have  occurred,  describing all such
Defaults or Events of Default of which such Officers may have  knowledge,  their
status and what  action the  Company or such  Guarantor,  as the case may be, is
taking or proposes to take with respect thereto).
<PAGE>

     (b) So long as  (and  to the  extent)  not  contrary  to the  then  current
recommendations of the American Institute of Certified Public  Accountants,  the
annual  financial   statements  delivered  pursuant  to  Section  4.8  shall  be
accompanied  by  a  written  statement  of  the  Company's   independent  public
accountants that in making the examination  necessary for  certification of such
annual financial  statements nothing has come to their attention that would lead
them to believe that the Company or any Guarantor has violated any provisions of
Section 4.10,  4.11,  4.12, 4.13, 4.14, 4.15, 4.16 or 4.17 of this Indenture or,
if any such  violation  has  occurred,  specifying  the  nature  and  period  of
existence thereof, it being understood that such accountants shall not be liable
directly or indirectly to any Person for any failure to obtain  knowledge of any
such violation.

     (c) The Company and each Guarantor  shall, so long as any of the Securities
are  outstanding,  deliver to the Trustee,  forthwith upon any Officer  becoming
aware of any Default or Event of Default,  an Officers'  Certificate  specifying
such  Default  or Event of  Default  and what  action  the  Company is taking or
proposes to take with respect thereto.

     SECTION 4.8  Reports.
                  -------

     So  long  as any of the  Securities  are  outstanding,  whether  or not the
Company is subject to Section  13(a) or 15(d) of the  Exchange  Act, the Company
shall  file  with  the SEC the  annual  reports,  quarterly  reports  and  other
documents  which  the  Company  would  have been  required  to file with the SEC
pursuant to such Sections  13(a) and 15(d) if the Company were so subject,  such
documents  to be filed  with the SEC on or prior to the  respective  dates  (the
"Required  Filing  Dates") by which the Company  would have been  required so to
file such  documents if the Company were so subject.  The Company  shall also in
any event (x) within 15 days after each  Required  Filing  Date (i)  transmit by
mail to all  Holders,  as their names and  addresses  appear in the  register of
Securities  maintained by the  Registrar,  without cost to such Holders and (ii)
file with the Trustee copies of the annual reports,  quarterly reports and other
documents  which  the  Company  would  have been  required  to file with the SEC
pursuant to Sections  13(a) and 15(d) of the  Exchange  Act if the Company  were
subject to such  Sections  and (y) if filing such  documents by the Company with
the SEC is not permitted  under the Exchange Act,  promptly upon written request
supply copies of such documents to any prospective  Holder.  The Company and the
Guarantors shall also comply with the other provisions of TIA Section 314(a).

     SECTION 4.9  Further Assurance to the Trustee.
                  --------------------------------

     The Company and the Guarantors shall, upon request of the Trustee,  execute
and deliver such further  instruments and do such further acts as may reasonably
be  necessary or proper to carry out more  effectively  the  provisions  of this
Indenture.
<PAGE>

     SECTION 4.10  Limitation on Additional Indebtedness.
                   -------------------------------------

     The Company  shall not,  and shall not permit any of its  Subsidiaries  to,
Incur  any  Indebtedness  (including  Acquired  Indebtedness),  except  for  the
following:

               (a)  Indebtedness  of the  Company and the  Guarantors  under the
          Securities, the Guarantees and this Indenture;

               (b)  Indebtedness  of the Company and the Guarantors  outstanding
          (plus  interest,   premium,  fees  and  other  obligations  associated
          therewith)  pursuant to the Credit  Facilities (or pursuant to letters
          of credit) not to exceed $40 million at any one time outstanding, less
          any Indebtedness under the Credit Facilities required to be repaid and
          repaid with the Net Cash Proceeds of an Asset Sale in accordance  with
          Section 4.13;

               (c)  Indebtedness  of the Company and  Guarantors  not  otherwise
          referred  to in this  Section  4.10  outstanding  on the  Issue  Date,
          including but not limited to the Existing Notes;

               (d)   Indebtedness   of  the  Company  and  the   Guarantors  if,
          immediately  after giving pro forma effect to the incurrence  thereof,
          the Fixed Charge  Coverage  Ratio of the Company would be greater than
          or equal to 3.0:1;

               (e)  Indebtedness of the Company and the Guarantors in respect of
          Interest Rate Protection  Obligations  incurred in the ordinary course
          of business;

               (f)  Indebtedness  of a  Subsidiary  issued  to and  held  by the
          Company or a Wholly-Owned Subsidiary or Indebtedness of the Company to
          a  Wholly-Owned  Subsidiary  in respect of  intercompany  advances  or
          transactions;

               (g) Indebtedness of the Company and the Guarantors Incurred after
          the Issue Date in connection with or arising out of Capitalized  Lease
          Obligations and purchase money  Indebtedness  not to exceed $5 million
          at any one time outstanding;

               (h) Indebtedness of the Company and the Guarantors Incurred after
          the Issue Date in  connection  with the  acquisition  or  licensing of
          technology and other assets relating to the implementation of new cell
          technology not to exceed $6 million at any one time outstanding; and

               (i)   any   deferrals,   renewals,   extensions,    replacements,
          refinancings,  or  refundings  of,  or  amendments,  modifications  or
          supplements to, Indebtedness incurred under clauses (b) and (c) above,
          whether involving the same or any other lender or creditor or group of
          lenders or  creditors,  provided  that any such  deferrals,  renewals,
          extensions,   replacements,   refinancings,   refundings,  amendments,
          modifications  or supplements  (i) shall not provide for any mandatory
          redemption,  amortization  or sinking  fund  requirement  in an amount
          greater than or at a time prior to the amounts and times  specified in
          the  Indebtedness  being  deferred,   renewed,   extended,   replaced,
          refinanced,  refunded,  amended, modified or supplemented,  (ii) shall
          not exceed the principal  amount (plus accrued interest and prepayment
          premium,  if  any)  of  the  Indebtedness  being  replaced,   renewed,
          refunded,  refinanced or extended and (iii) shall be  subordinated  to
          the  Securities  at least to the extent and in the manner,  if at all,
          that the Indebtedness being replaced, renewed, refunded, refinanced or
          extended is subordinate to the Securities.
<PAGE>

     The Company shall not, directly or indirectly, Incur any Indebtedness which
by its terms (or by the terms of any agreement  governing such  Indebtedness) is
subordinated to any other  Indebtedness of the Company unless such  Indebtedness
is  also  by its  terms  (or by  the  terms  of  any  agreement  governing  such
Indebtedness)  made expressly  subordinated to the Securities to the same extent
and in the same  manner  as such  Indebtedness  is  subordinated  to such  other
Indebtedness of the Company.  The Guarantors shall not,  directly or indirectly,
in any event Incur any  Indebtedness  which by its terms (or by the terms of any
agreement governing such Indebtedness) is subordinated to any other Indebtedness
of such Guarantor unless such Indebtedness is also by its terms (or by the terms
of any agreement governing such Indebtedness) made expressly subordinated to the
Guarantee of the Securities by such Guarantor to the same extent and in the same
manner as such  Indebtedness is subordinated to such other  Indebtedness of such
Guarantor.

     SECTION 4.11  Limitation on Liens.
                   -------------------

     The Company  shall not,  and shall not  permit,  cause or suffer any of its
Subsidiaries to, create,  incur,  assume or suffer to exist any Lien of any kind
upon any of its  property or assets owned or acquired by the Company on or after
the Issue Date, except for the following:

               (a) Liens existing as of the Issue Date;

               (b) Permitted Liens;

               (c)  Liens on the  assets  or  property  of a  Subsidiary  of the
          Company  existing at the time such  Subsidiary  became a Subsidiary of
          the Company and not incurred as a result of (or in connection  with or
          in  anticipation  of) such  Subsidiary's  becoming a Subsidiary of the
          Company;  provided  that  such  Liens do not  extend  to or cover  any
          property  or assets of the Company or any of its  Subsidiaries  (other
          than the property or assets of the Subsidiary so acquired);

               (d) Liens on inventory,  accounts,  contract  rights,  documents,
          instruments   and  general   intangibles  in  respect  of  the  Credit
          Facilities (or letters of credit);

               (e) any Lien securing  Capitalized Lease Obligations and purchase
          money  obligations;  provided that such Capitalized  Lease Obligations
          and purchase money obligations are incurred in compliance with Section
          4.10; and provided further,  that such Liens do not extend to or cover
          any property or assets owned by the Company or any of its Subsidiaries
          as of the Issue Date or extend to any  property  or assets  other than
          the property or assets subject to such Capitalized  Lease  Obligations
          and purchase money obligations;
<PAGE>

               (f) Liens pursuant to leases and subleases of real property which
          do not  interfere  with the  ordinary  conduct of the  business of the
          Company or any of its Subsidiaries and which are made on customary and
          usual terms applicable to similar properties;

               (g) Liens securing Indebtedness which is incurred to refinance or
          replace  Indebtedness which has been secured by a Lien permitted under
          this  Indenture and is permitted to be  refinanced  or replaced  under
          this Indenture; provided that such Liens do not extend to or cover any
          property  or  assets of the  Company  or any of its  Subsidiaries  not
          securing the Indebtedness so refinanced or replaced; and

               (h) Liens  securing  reimbursement  obligations  under letters of
          credit  but only in or upon  the  goods  the  purchase  of  which  was
          financed by such letters of credit.

     SECTION 4.12  Limitation on Restricted Payments.
                   ---------------------------------

     (a) The Company shall not, and shall not permit any of its Subsidiaries to,
directly or indirectly, make any Restricted Payment, unless:

               (i) no  Default or Event of Default  shall have  occurred  and be
          continuing  under this Indenture at the time of or after giving effect
          to such Restricted Payment; and

               (ii) immediately after giving effect to such Restricted  Payment,
          the aggregate of all  Restricted  Payments  declared or made after the
          Issue Date through and including the date of such  Restricted  Payment
          (the  "Base  Period")  does  not  exceed  the  sum of  (1)  50% of the
          Company's  Consolidated Net Income (or in the event such  Consolidated
          Net Income shall be a deficit,  minus 100% of such deficit) during the
          Base Period,  and (2) 100% of the  aggregate Net Proceeds and the Fair
          Market Value of  marketable  securities  and property  received by the
          Company  from the issue or sale,  during  the Base  Period of  Capital
          Stock  (other  than   Disqualified   Stock)  of  the  Company  or  any
          Indebtedness or other  securities of the Company  convertible  into or
          exercisable or exchangeable for Capital Stock (other than Disqualified
          Stock)  of the  Company  which  has been so  converted,  exercised  or
          exchanged,  as the case may be. For purposes of determining under this
          clause  (ii)  the  amount  expended  for  Restricted  Payments,   cash
          distributed  shall be valued at the face amount  thereof and  property
          other than cash shall be valued at its Fair Market Value.
<PAGE>

     (b) The  provisions  of clause (a) of this  Section 4.12 shall not prohibit
(i) the  payment of any  dividend  within 60 days after the date of  declaration
thereof,  if at such date of  declaration  such  payment  would  comply with the
provisions of this Indenture; (ii) the retirement of any shares of Capital Stock
or subordinated Indebtedness of the Company in exchange for, by conversion into,
or out of the Net Proceeds of the substantially concurrent sale (other than to a
Subsidiary  of the  Company)  of other  shares of Capital  Stock of the  Company
(other  than  Disqualified   Stock);  (iii)  the  redemption  or  retirement  of
subordinated Indebtedness of the Company in exchange for, by conversion into, or
out  of  the  Net  Proceeds  of  the  substantially   concurrent  incurrence  of
subordinated  Indebtedness  of the  Company  (other  than any such  subordinated
Indebtedness  owing  to a  Subsidiary  of the  Company)  that  is  contractually
subordinated  in right of payment to the  Securities and that is permitted to be
incurred in accordance with Section 4.10; (iv) a management fee payable to Renco
not to exceed  $1.2  million in any one year;  (v) the making of payments by the
Company to Renco (A) no earlier  than ten days prior to the date on which  Renco
is  required  to make  its  payments  to the  Internal  Revenue  Service  or the
applicable state taxing authority, as the case may be, pursuant to a tax sharing
agreement  between the Company and Renco (which tax sharing  agreement  provides
that the payments  thereunder shall not exceed the amount the Company would have
been required to pay for taxes on a stand-alone  basis,  except that the Company
will not have the benefit of any of its tax loss  carryforwards  unless such tax
losses were a result of timing differences between the Company's  accounting for
tax and  financial  reporting  purposes,  and which tax sharing  agreement  also
provides  that  transactions  between  the  Company  and  Renco  and  its  other
subsidiaries  are accounted for on a cash basis and not on an accrual basis) and
(B) to reimburse  Renco for out of pocket  insurance  payments  made by Renco on
behalf of the  Company and its  Subsidiaries;  (vi) the payment of a dividend to
Renco  on the  Issue  Date  of  approximately  $75.03  million;  and  (vii)  the
redemption  on the Issue Date of the 8,500  outstanding  shares of the Company's
100%  Preferred  Stock,  $1,000 par value per share,  held by Renco plus accrued
dividends thereon.

     In determining the amount of Restricted  Payments  permissible under clause
(b) of this  Section  4.12,  amounts  expended  pursuant  to clauses  (b)(i) and
(b)(ii) of this  Section  4.12 shall be  included  as  Restricted  Payments  and
amounts expended pursuant to clauses (b)(iii), (iv), (v), (vi) and (vii) of this
Section 4.12 shall not be so included.  For purposes of  determining  the amount
expended for Restricted  Payments,  cash distributed or invested shall be valued
at the face amount  thereof and property  other than cash shall be valued at its
Fair Market Value.

     SECTION 4.13  Limitation on Certain Sales of Assets and Subsidiary Stock.
                   ----------------------------------------------------------

     (a) The Company shall not, and shall not permit any of its Subsidiaries to,
make any Asset Sale  unless (i) such Asset Sale is for Fair Market  Value,  (ii)
the net proceeds  therefrom consist of at least 85% cash or Cash Equivalents and
(iii) the Company  shall commit to apply or to cause its  Subsidiaries  to apply
the Net Cash Proceeds of such Asset Sale within 180 days of receipt thereof, and
shall  apply  such Net Cash  Proceeds  within 270 days of  receipt  thereof,  as
follows:

               (A) first, to satisfy all mandatory  repayment  obligations under
          the  Credit  Facilities  arising  by reason of such  Asset Sale to the
          extent that such repayment  permanently reduces the amount that may be
          borrowed under the Credit Facilities;
<PAGE>

               (B)  second,   to  repurchase   Existing  Notes  required  to  be
          repurchased  pursuant to the indenture  governing the Existing  Notes;
          and

               (C)  third,  out  of  any  Net  Cash  Proceeds   remaining  after
          application of Net Cash Proceeds pursuant to the preceding  paragraphs
          (A) and (B) (the "Available Amount"),  the Company shall make an offer
          to purchase  (the "Asset Sale Offer") from all Holders of  Securities,
          up to a maximum  principal amount  (expressed as a multiple of $1,000)
          of  Securities  equal to the Available  Amount at a purchase  price of
          100% of the principal  amount thereof plus accrued and unpaid interest
          thereon,  if any,  to the date of purchase  (the "Asset Sale  Purchase
          Date");  provided  that  the  Company  will not be  required  to apply
          pursuant to this  paragraph  (C) Net Cash  Proceeds  received from any
          Asset Sale if, and only to the extent that, such Net Cash Proceeds are
          committed in writing to be applied to acquire or construct property or
          assets  in  lines  of  business  related  to  the  Company's  and  its
          Subsidiaries'  businesses  within 180 days after the  consummation  of
          such  Asset  Sale  and  are so  applied  within  270  days  after  the
          consummation  of such  Asset  Sale;  and  provided  further,  that the
          Company  may defer the Asset Sale Offer  until  there is an  aggregate
          unutilized  Available Amount equal to or in excess of $2.5 million (at
          which time the  entire  unutilized  Available  Amount and not just the
          amount in excess of $2.5 million shall be applied as required pursuant
          to this Section 4.13).

     (b) The Company shall provide the Trustee with written  notice of the Asset
Sale Offer at least 40 days  before any notice of any Asset Sale Offer is mailed
to  Holders  of the  Securities  (unless  shorter  notice is  acceptable  to the
Trustee).  Notice of an Asset Sale Offer  shall be mailed by the  Company to all
Holders  of  Securities  not less than 25 days nor more than 45 days  before the
Asset Sale  Purchase  Date at their last  registered  address with a copy to the
Trustee and the Paying  Agent.  The Asset Sale Offer shall  remain open from the
time of mailing for at least 20 Business Days and until at least 4:00 p.m.,  New
York City time, on the Business Day next preceding the Asset Sale Purchase Date.
The notice,  which shall govern the terms of the Asset Sale Offer, shall include
such disclosures as are required by law and shall state:

               (i) that the Asset  Sale  Offer is being  made  pursuant  to this
          Section 4.13;

               (ii)  the  purchase  price   (including  the  amount  of  accrued
          interest, if any) for each Security and the Asset Sale Purchase Date;

               (iii) that any Security not tendered or accepted for payment will
          continue to accrue interest in accordance with the terms thereof;

               (iv) that, unless the Company defaults on making the payment, any
          Security  accepted for payment  pursuant to the Asset Sale Offer shall
          cease to accrue interest after the Asset Sale Purchase Date;
<PAGE>

               (v) that Holders electing to have Securities  purchased  pursuant
          to an Asset Sale Offer will be required to surrender their  Securities
          to the Paying  Agent at the address  specified  in the notice prior to
          4:00 p.m.,  New York City time, on the business day next preceding the
          Asset  Sale  Purchase  Date  and must  complete  any  form  letter  of
          transmittal  proposed by the Company and acceptable to the Trustee and
          the Paying Agent;

               (vi) that Holders will be entitled to withdraw  their election if
          the Paying  Agent  receives,  not later than 4:00 p.m.,  New York City
          time, on the business day next preceding the Asset Sale Purchase Date,
          a tested telex,  facsimile  transmission  or letter  setting forth the
          name of the Holder,  the  principal  amount of  Securities  the Holder
          delivered for purchase, the Security certificate number (if any) and a
          statement  that such Holder is  withdrawing  his election to have such
          Securities purchased;

               (vii) that if Securities  in a principal  amount in excess of the
          Available  Amount are tendered  pursuant to the Asset Sale Offer,  the
          Company  shall  purchase  Securities  on a pro rata  basis  among  the
          Securities   tendered   (with  such   adjustments  as  may  be  deemed
          appropriate by the Company so that only Securities in denominations of
          $1,000 or integral multiples of $1,000 shall be acquired);

               (viii) that Holders whose  Securities  are purchased only in part
          will be  issued  new  Securities  equal  in  principal  amount  to the
          unpurchased portion of the Securities surrendered; and

               (ix) the instructions that Holders must follow in order to tender
          their Securities.

     On or before the Asset Sale Purchase Date, the Company shall (i) accept for
payment,  on a pro rata basis among the  Securities  (subject to  adjustment  as
contemplated  by clause (vii) above),  Securities or portions  thereof  tendered
pursuant  to the Asset Sale Offer,  (ii)  deposit  with the Paying  Agent on the
Asset Sale Purchase Date money,  in immediately  available  funds,  in an amount
sufficient to pay the purchase  price of all  Securities or portions  thereof so
tendered  and  accepted  and (iii)  deliver to the  Trustee  the  Securities  so
accepted together with an Officers'  Certificate setting forth the Securities or
portions thereof tendered to and accepted for payment by the Company. The Paying
Agent  shall  promptly  mail or deliver to Holders  of  Securities  so  accepted
payment in an amount equal to the purchase price, and the Trustee shall promptly
authenticate  and  mail or  deliver  to such  Holders  a new  Security  equal in
principal  amount to any unpurchased  portion of the Security  surrendered.  Any
Securities not so accepted shall be promptly  mailed or delivered by the Company
to the Holder thereof. To the extent an Asset Sale Offer is not fully subscribed
to by the  Holders,  the Company may retain  (free and clear of the Lien of this
Indenture)  any  unutilized  portion of the Available  Amount.  The Paying Agent
shall promptly deliver to the Company the balance of any such moneys held by the
Paying Agent after payment to the holders of Securities as aforesaid.

     The Company shall comply, to the extent  applicable,  with the requirements
of  Section  14(e)  of the  Exchange  Act  and  any  other  securities  laws  or
regulations  in connection  with the  repurchase  of Securities  pursuant to the
Asset Sale Offer.  To the extent that the provisions of any  securities  laws or
regulations  conflict with  provisions  of this Section 4.13,  the Company shall
comply with the  applicable  securities  laws and  regulations  and shall not be
deemed to have  breached  its  obligations  under  this  Section  4.13 by virtue
thereof.
<PAGE>

     (c) No transaction or action  otherwise  permitted  under this Section 4.13
shall occur until the Trustee shall have received an Officers'  Certificate  and
an Opinion of Counsel as to (i) the Company's  compliance with this Section 4.13
and (ii) the  fulfillment  of all  conditions  precedent to such  transaction or
action.

     SECTION 4.14  Limitation on Transactions with Affiliates.
                   ------------------------------------------

     The Company shall not, and the Company shall not permit,  cause,  or suffer
any  Subsidiary  of the  Company  to,  conduct  any  business  or enter into any
transaction or series of  transactions  with or for the benefit of any Affiliate
of the  Company or any of its  Subsidiaries  or any holder of 10% or more of any
class of Capital Stock of the Company (each an "Affiliate Transaction"),  except
in good faith and on terms that are, in the aggregate,  no less favorable to the
Company or such Subsidiary,  as the case may be, than those that could have been
obtained in a comparable  transaction on an arm's-length basis from a Person not
an Affiliate of the Company or such Subsidiary.  All Affiliate Transactions (and
each  series of related  Affiliate  Transactions  which are similar or part of a
common  plan)  involving  aggregate  payments or other market value in excess of
$500,000  shall be  approved  by the Board of  Directors  of the  Company,  such
approval  to be  evidenced  by a Board  Resolution  stating  that such  Board of
Directors has, in good faith, determined that such transaction complies with the
foregoing  provisions of this Section 4.14.  Notwithstanding the foregoing,  the
restrictions  set forth in this  Section  4.14 shall not apply to (i)  customary
directors' fees, consulting fees, indemnification and similar arrangements,  and
employee salaries and bonuses,  (ii) transactions between the Company and any of
its  Subsidiaries or among  Subsidiaries of the Company,  (iii) the payment of a
management  fee to Renco and (iv) the making of payments by the Company to Renco
pursuant to Section 4.12(b)(v), (vi) and (vii).

     SECTION 4.15  Change of Control.
                   -----------------

     In the event of a Change of Control (the date of such occurrence  being the
"Change of Control Date"),  the Company shall notify the Trustee and the Holders
of Securities in writing of such  occurrence and shall make an offer to purchase
(the  "Change of Control  Offer"),  on a  Business  Day (the  "Change of Control
Payment  Date") not later than 60 days following the Change of Control Date, all
Securities  then  outstanding at a purchase price equal to 101% of the principal
amount  thereof  plus  accrued  and unpaid  interest,  if any,  to the Change of
Control Payment Date.

     Notice of a Change of Control Offer shall be mailed by the Company not less
than 30 days nor more than 45 days before the Change of Control  Payment Date to
the holders of Securities at their last registered  addresses with a copy to the
Trustee and the Paying Agent. The Change of Control Offer shall remain open from
the time of mailing for at least 20 Business Days and until 5:00 p.m.,  New York
City time,  on the Business  Day next  preceding  the Change of Control  Payment
Date.  The notice,  which shall govern the terms of the Change of Control Offer,
shall include such disclosures as are required by law and shall state:
<PAGE>

               (a) that a Change of Control Offer is being made pursuant to this
          Section 4.15 and that all Securities will be accepted for payment;

               (b) the purchase price (including the amount of accrued interest,
          if any) for each Security and the Change of Control Payment Date;

               (c) that any Security  not tendered for payment will  continue to
          accrue interest in accordance with the terms thereof;

               (d) that, unless the Company defaults on making the payment,  any
          Security  accepted for payment pursuant to the Change of Control Offer
          shall  cease to accrue  interest  after the Change of Control  Payment
          Date;

               (e) that Holders electing to have Securities  purchased  pursuant
          to a Change of  Control  Offer will be  required  to  surrender  their
          Securities to the Paying Agent at the address  specified in the notice
          prior to 5:00  p.m.,  New York City  time,  on the  business  day next
          preceding  the Change of Control  Payment  Date and must  complete any
          form letter of  transmittal  proposed by the Company and acceptable to
          the Trustee and the Paying Agent;

               (f) that Holders of Securities will be entitled to withdraw their
          election if the Paying Agent  receives,  not later than 4:00 p.m., New
          York City  time,  on the  business  day next  preceding  the Change of
          Control Payment Date, a tested telex, facsimile transmission or letter
          setting  forth  the  name  of the  Holder,  the  principal  amount  of
          Securities the Holder delivered for purchase, the Security certificate
          number (if any) and a statement  that such Holder is  withdrawing  his
          election to have such Securities purchased;

               (g) that Holders whose Securities are purchased only in part will
          be issued  Securities  equal in  principal  amount to the  unpurchased
          portion of the Securities surrendered;

               (h) the instructions  that Holders must follow in order to tender
          their Securities; and

               (i) the circumstances and relevant facts regarding such Change of
          Control  (including,  but not limited to,  information with respect to
          pro forma historical financial information after giving effect to such
          Change of Control, information regarding the Persons acquiring control
          and such Persons' business plans going forward).

     On the Change of Control  Payment  Date,  the Company  shall (i) accept for
payment  Securities  or  portions  thereof  tendered  pursuant  to the Change of
Control  Offer,  (ii) deposit with the Paying Agent money  sufficient to pay the
purchase  price of all  Securities or portions  thereof so tendered and accepted
and (iii)  deliver to the Trustee the  Securities  so accepted  together with an
Officers'  Certificate setting forth the Securities or portions thereof tendered
to and accepted for payment by the Company. The Paying Agent shall promptly mail
or deliver to the Holders of Securities  so accepted  payment in an amount equal
to the purchase price,  and the Trustee shall promptly  authenticate and mail or
deliver  to such  Holders  a new  Security  equal  in  principal  amount  to any
unpurchased portion of the Security surrendered.  Any Securities not so accepted
shall be promptly mailed or delivered by the Company to the Holder thereof.
<PAGE>

     The Company shall comply, to the extent  applicable,  with the requirements
of  Section  14(e)  of the  Exchange  Act,  and  any  other  securities  laws or
regulations in connection with the repurchase of Securities pursuant to a Change
of Control Offer.  To the extent that the  provisions of any securities  laws or
regulations  conflict with  provisions  of this Section 4.15,  the Company shall
comply with the  applicable  securities  laws and  regulations  and shall not be
deemed to have  breached  its  obligations  under  this  Section  4.15 by virtue
thereof.

     SECTION  4.16  Limitation on Dividends and Other
                    Payment Restrictions Affecting Subsidiaries.
                    -------------------------------------------

     The Company  shall not, and shall not permit any  Subsidiary of the Company
to,  directly or  indirectly,  create or  otherwise  cause or suffer to exist or
become effective or enter into any agreement with any Person that would cause or
create any  consensual  encumbrance or restriction of any kind on the ability of
any  Subsidiary of the Company to (a) pay  dividends,  in cash or otherwise,  or
make any other  distributions  on its  Capital  Stock or any other  interest  or
participation  in,  or  measured  by,  its  profits  owned by the  Company  or a
Subsidiary  of the  Company,  (b) make  any  loans or  advances  to,  or pay any
Indebtedness  owed to,  the  Company  or any  Subsidiary  of the  Company or (c)
transfer any of its  properties or assets to the Company or to any Subsidiary of
the  Company,  except,  in each  case,  for such  encumbrances  or  restrictions
existing  under or  contemplated  by or by reason of (i) the  Securities or this
Indenture, (ii) any restrictions existing under or contemplated by agreements in
effect on the Issue Date, including, without limitation,  restrictions under the
Credit Facilities as in effect on the Issue Date, (iii) any  restrictions,  with
respect to a Subsidiary  of the Company that is not a Subsidiary  of the Company
on the Issue Date, in existence at the time such Person  becomes a Subsidiary of
the  Company  (but not  created  in  contemplation  of such  Person  becoming  a
Subsidiary)  or created after the Issue Date, so long as such  restrictions  are
not materially  less favorable to the holders of the Securities than those under
the Credit  Facilities as in effect on the Issue Date, and (iv) any restrictions
existing under any agreement that refinances or replaces an agreement containing
a restriction  permitted by clause (i),  (ii) or (iii) above;  provided that the
terms and conditions of any such  restrictions are not materially less favorable
in the aggregate to the holders of the  Securities  than those under or pursuant
to the agreement  being replaced or the agreement  evidencing  the  Indebtedness
refinanced or replaced.

     SECTION 4.17  Limitation on Issuance of Preferred Stock by Subsidiaries.
                   ---------------------------------------------------------

     The  Company  shall not cause or permit any  Subsidiary  of the  Company to
issue any Capital  Stock other than Common Stock or to have  outstanding  at any
time any shares of Capital  Stock other than Common Stock,  except  issuances of
Capital Stock to the Company or a Wholly-Owned Subsidiary of the Company that is
a Guarantor; provided, however, that the Company or such Wholly-Owned Subsidiary
of the  Company,  as the case may be, is at all times  the sole  beneficial  and
record owner of such Capital Stock.
<PAGE>

     SECTION 4.18  Special Covenants of Each Guarantor.
                   -----------------------------------

     Each  Guarantor  shall comply with each of the covenants  contained in this
Indenture that impose  restrictions  or obligations on such Guarantor (by virtue
of  being a  Guarantor  or  otherwise)  notwithstanding  that  the  text of such
covenant is worded as a restriction on or obligation of the Company with respect
to such Guarantor.

     SECTION 4.19  Additional Guarantors.
                   ---------------------

     If the  Company or any of its  Subsidiaries  shall  transfer or cause to be
transferred, in one or a series of related transactions, any assets, businesses,
divisions,  real property or equipment having a book value in excess of $100,000
to any  Subsidiary  that is not a  Guarantor  the Company  shall,  prior to such
transfer, (1) cause such transferee Subsidiary to become a Guarantor,  execute a
Guarantee and agree to be bound by the terms of this Indenture,  and (2) deliver
an Opinion of Counsel to the effect that such Guarantee has been duly authorized
and executed by such transferee  Subsidiary and  constitutes  the legal,  valid,
binding and  enforceable  obligation of such transferee  Subsidiary  (subject to
such customary exceptions  concerning creditors' rights and equitable principles
as may be acceptable to the Trustee in its discretion).

     SECTION 4.20  Limitation on Investments, Loans and Advances.
                   ---------------------------------------------

     The Company shall not make and shall not permit any of its  Subsidiaries to
make any capital  contributions,  advances or loans to (including any guarantees
of loans to),  or  investments  or  purchases  of  Capital  Stock in, any Person
(collectively,  "Investments"),  except:  (i)  Investments by the Company in any
Wholly-Owned  Subsidiary and Investments in or to the Company or a Subsidiary by
any Subsidiary;  (ii) Investments  represented by accounts receivable created or
acquired in the ordinary course of business,  (iii) advances to employees in the
ordinary  course of business not to exceed an aggregate of $250,000  outstanding
at any one time; (iv) Investments  under or pursuant to Interest Rate Protection
obligations;  (v) Cash  Equivalents;  (vi)  Investments in joint ventures not to
exceed $10 million in the aggregate;  and (vii) Investments permitted to be made
pursuant to Section 4.12.

     SECTION 4.21  Limitation on Sale-Leaseback Transactions.
                   -----------------------------------------

     The Company  shall not,  and shall not permit any of its  Subsidiaries  to,
enter into any Sale-Leaseback  Transaction.  Notwithstanding the foregoing,  the
Company and its Subsidiaries may enter into  Sale-Leaseback  Transactions if (i)
after  giving  pro forma  effect  to any such  Sale-Leaseback  Transaction,  the
Company  shall be in compliance  with Section 4.10,  (ii) the sale price in such
Sale-Leaseback  Transaction  is at least equal to the Fair Market  Value of such
property,  and (iii) the  Company or such  Subsidiary  shall  apply the Net Cash
Proceeds  of the sale as  provided  pursuant  to  Section  4.13,  to the  extent
required.
<PAGE>

     SECTION 4.22  Waiver of Stay, Extension or Usury Laws
                   ---------------------------------------

     Each of the Company and the Guarantors  covenants (to the extent  permitted
by law)  that it will not at any  time  insist  upon,  plead,  or in any  manner
whatsoever  claim or take the benefit or advantage of, any stay or extension law
or any usury law or other law that would  prohibit or forgive the Company or any
Guarantor  from paying all or any portion of the principal of or interest on the
Securities  as  contemplated  herein,  wherever  enacted,  now  or at  any  time
hereafter in force,  or that may affect the covenants or the performance of this
Indenture;  and (to the extent  permitted  by law) each of the  Company and each
Guarantor  hereby expressly waives all benefit or advantage of any such law, and
covenants  that it will not hinder,  delay or impede the  execution of any power
herein granted to the Trustee, but will suffer and permit the execution of every
such power as though no such law had been enacted.

                                    ARTICLE V


                              SUCCESSOR CORPORATION
                              ---------------------

     SECTION 5.1  When Company May Merge, Etc.
                  ----------------------------

     Neither the Company nor any Guarantor shall  consolidate with or merge with
or into or sell, assign,  convey,  lease or transfer all or substantially all of
its  properties  and assets as an entirety to any Person or group of  affiliated
Persons in a single  transaction  or through a series of  transactions,  unless,
after giving effect thereto:

                  (a)  the Company or such  Guarantor, as the case may be, shall
         be the  continuing  Person or the  resulting,  surviving or  transferee
         Person (the  "surviving  entity") shall be a corporation  organized and
         existing  under the laws of the United  States or any State  thereof or
         the District of Columbia;

                  (b)  the  surviving  entity  shall  expressly   assume,  by  a
         supplemental  indenture executed and delivered to the Trustee,  in form
         and  substance  reasonably  satisfactory  to  the  Trustee,  all of the
         obligations of the Company or such Guarantor, as the case may be, under
         the Securities, the Guarantees and this Indenture;

                  (c)  immediately before and immediately after giving effect to
         such  transaction  or  series  of  transactions   (including,   without
         limitation,  any Indebtedness incurred or anticipated to be incurred in
         connection  with  or in  respect  of  such  transaction  or  series  of
         transactions),  no Default or Event of Default  shall have occurred and
         be continuing;

                  (d)  the Company,  such Guarantor or the surviving  entity, as
         the case may be, shall immediately  before and immediately after giving
         effect  to such  transaction  or  series  of  transactions  (including,
         without  limitation,  any  Indebtedness  incurred or  anticipated to be
         incurred in connection  with or in respect of the transaction or series
         of transactions) have a Consolidated Net Worth equal to or greater than
         the Consolidated Net Worth of the Company or such Guarantor immediately
         prior to such transaction or series of transactions;
<PAGE>

                  (e)  immediately  after giving effect to such  transaction  or
         series of  transactions,  the Company,  such Guarantor or the surviving
         entity, as the case may be, could incur $1.00 of Indebtedness  pursuant
         to clause (d) of Section 4.10;

                  (f)  the Company, such Guarantor or the surviving entity shall
         have  delivered  to the Trustee an Officer's  Certificate  stating that
         such  consolidation,  merger,  conveyance,  transfer or lease and, if a
         supplemental  indenture is required in connection with such transaction
         or series of transactions,  such supplemental  indenture  complies with
         this Section 5.1 and that all  conditions  precedent  in the  Indenture
         relating  to the  transaction  or  series  of  transactions  have  been
         satisfied; and

                  (g)  neither the Company nor any  Subsidiary  would  thereupon
         become  obligated  with  respect  to any  Indebtedness,  nor any of its
         property  become  subject  to any  Lien,  unless  the  Company  or such
         Subsidiary could incur such  Indebtedness or create such Lien under the
         Indenture.

     The  foregoing  provisions  shall  not  be  applicable  with  respect  to a
transaction  involving the  consolidation  or merger of a Guarantor with or into
any Person  (other than the Company or an Affiliate of the Company) that results
in such  Guarantor  being  released from its  Guarantee as provided  pursuant to
Section 10.3.

     SECTION 5.2  Successor Entity Substituted.
                  ----------------------------

     Upon any consolidation,  merger or any transfer of all or substantially all
of the assets of the Company in  accordance  with  Section  5.1,  the  surviving
entity  formed by such  consolidation  or into which the Company is merged or to
which such  transfer is made shall succeed to, and be  substituted  for, and may
exercise  every right and power of, the Company  under this  Indenture  with the
same effect as if such surviving entity had been named as the Company herein.

                                   ARTICLE VI


                              DEFAULT AND REMEDIES
                              --------------------

     SECTION 6.1  Events of Default.
                  -----------------

     (a)  An "Event of Default" occurs if:

               (i) the  Company  defaults  in the  payment  of  interest  on the
          Securities  when the same becomes due and payable and any such default
          continues for a period of 30 days; or

               (ii) the Company  defaults in the payment of the principal of, or
          premium, if any, on, the Securities when due (including by reason of a
          default in payment upon an offer to purchase); or
<PAGE>

               (iii) the Company or any  Guarantor  defaults in the  performance
          of, or breaches,  any covenant contained in this Indenture (other than
          defaults  specified in clause (i) or (ii) above),  and such default or
          breach  continues for a period of 30 days after written notice thereof
          has been given to the Company by the Trustee or to the Company and the
          Trustee by the Holders of at least 25% in aggregate  principal  amount
          of the outstanding Securities; or

               (iv) the Company or any of its Subsidiaries  fails to perform any
          term,  covenant,  condition  or  provision  of one or more  classes or
          issues  of other  Indebtedness  in an  aggregate  principal  amount of
          $2,000,000 or more,  which failure  results in an  acceleration of the
          maturity thereof; or

               (v) one or more  judgments,  orders or decrees for the payment of
          money in excess of $2,000,000,  either individually or in an aggregate
          amount,  shall be entered against the Company, any of its Subsidiaries
          or any of their respective properties and shall not be discharged, and
          there  shall  have  been a period  of 60 days  during  which a stay of
          enforcement  of such judgment or order,  by reason of a pending appeal
          or otherwise, shall not be in effect; or

               (vi) any Guarantee shall be found to be  unenforceable or invalid
          by any final judgment, order or decree of any court; or

               (vii) the  Company  or any  Guarantor  pursuant  to or within the
          meaning of any Bankruptcy Law:

                         (A) commences a voluntary case or proceeding,

                         (B)  consents  to the  entry  of an  order  for  relief
               against it in an involuntary case or proceeding,

                         (C) consents to the appointment of a Custodian of it or
               for all or substantially all of its property,

                         (D) makes a general  assignment  for the benefit of its
               creditors or

                         (E) shall  generally  not pay its debts when such debts
               become due or shall  admit in writing  its  inability  to pay its
               debts generally; or

               (viii)  a court  of  competent  jurisdiction  enters  an order or
          decree under any Bankruptcy Law that:

                         (A) is for relief  against the Company or any Guarantor
               in an involuntary case or proceeding,

                         (B)   appoints  a  Custodian  of  the  Company  or  any
               Guarantor for all or substantially all of its properties, or

                         (C)  orders  the  liquidation  of  the  Company  or any
               Guarantor,

               and in each  case the  order or decree  remains  unstayed  and in
               effect for 60 days; provided,  however, that if the entry of such
               order or decree is  appealed  and  dismissed  on appeal  then the
               Event of Default  hereunder  by reason of the entry of such order
               or decree shall be deemed to have been cured.
<PAGE>

     (b) For  purposes  of this  Section  6.1,  the term  "Custodian"  means any
receiver,  trustee,  assignee,  liquidator,  sequestrator  or  similar  official
charged with  maintaining  possession  or control over  property for one or more
creditors.

     (c) Subject to the  provisions  of Sections 7.1 and 7.2, the Trustee  shall
not be charged with  knowledge  of any Event of Default  unless  written  notice
thereof shall have been given to a Trust  Officer at the corporate  trust office
of the Trustee by the Company or any other Person.

     SECTION 6.2  Acceleration.
                  ------------

     If an Event of Default (other than an Event of Default specified in Section
6.1(a)(vii) or (viii) with respect to the Company or any  Guarantor)  occurs and
is continuing,  the Holders of at least 25% in aggregate principal amount of the
outstanding  Securities  may, by written  notice to the Company and the Trustee,
and the Trustee upon the written  request of the Holders of not less than 25% in
aggregate  principal  amount of the  outstanding  Securities,  shall declare the
principal of, premium,  if any, and accrued interest on all the Securities to be
due and payable immediately. Upon any such declaration such amounts shall become
due and  payable  immediately.  If an  Event of  Default  specified  in  Section
6.1(a)(vii) or (viii) with respect to the Company or any Guarantor occurs and is
continuing,  then the principal of, premium, if any, and accrued interest on all
the  Securities  shall ipso  facto  become and be  immediately  due and  payable
without any  declaration  or other act on the part of the Trustee or any Holder.
The  Holders  of  a  majority  in  aggregate  principal  amount  of  outstanding
Securities  may, by written notice to the Trustee,  rescind such  declaration of
acceleration if all existing Events of Default have been cured or waived,  other
than the non-payment of principal of, premium,  if any, and accrued  interest on
the Securities that have become due solely as a result of such  acceleration and
if the  rescission  of  acceleration  would not  conflict  with any  judgment or
decree.  No such  rescission  shall affect any subsequent  default or impair any
right consequent thereto.

     SECTION 6.3  Other Remedies.
                  --------------

     If an Event of Default occurs and is continuing, the Trustee may pursue any
available  remedy by  proceeding  at law or in equity to collect  the payment of
principal of,  premium,  if any, or interest on the Securities or to enforce the
performance of any provision of the Securities or this Indenture.

     All rights of action and claims under this  Indenture or the Securities may
be  enforced  by the  Trustee  even if the  Trustee  does not possess any of the
Securities  or  does  not  produce  any of them in the  proceeding.  A delay  or
omission by the Trustee or any  Securityholder in exercising any right or remedy
accruing  upon an Event of  Default  shall  not  impair  the  right or remedy or
constitute  a waiver of or  acquiescence  in the Event of Default.  No remedy is
exclusive of any other  remedy.  All  available  remedies are  cumulative to the
extent permitted by law.
<PAGE>

     SECTION 6.4  Waiver of Past Default.
                  ----------------------

     Subject to Sections 6.7 and 9.2, the Holders of, in the aggregate, at least
a majority in aggregate principal amount of the outstanding Securities by notice
to the  Trustee  may  waive an  existing  Default  or Event of  Default  and its
consequences,  except a Default  specified  in Section  6.1(a)(i)  or (ii) or in
respect of any provision  hereof which cannot be modified or amended without the
consent of the Holder so  affected  pursuant to Section  9.2.  When a Default or
Event of Default is so waived, it shall be deemed cured and ceases.

     SECTION 6.5  Control by Majority.
                  -------------------

     The Holders of at least a majority  in  aggregate  principal  amount of the
outstanding  Securities may direct the time,  method and place of conducting any
proceeding  for any remedy  available to the Trustee or exercising  any trust or
power conferred on it; provided,  however, that the Trustee may refuse to follow
any direction  that (i) conflicts with law or this  Indenture,  (ii) the Trustee
determines may be unduly prejudicial to the rights of another Securityholder, or
(iii) may involve the Trustee in personal liability unless the Trustee has asked
for and  received  indemnification  reasonably  satisfactory  to it in its  sole
discretion  against any loss or expense caused by its following such  direction;
and provided,  further, that the Trustee may take any other action deemed proper
by the Trustee that is not inconsistent with such direction.

     SECTION 6.6  Limitation on Suits.
                  -------------------

     A  Securityholder  may not pursue any remedy with respect to this Indenture
or the Securities unless:

               (a) the Holder or Holders give to the Trustee written notice of a
          continuing Event of Default;

               (b) the Holders of at least 25% in aggregate  principal amount of
          the  outstanding  Securities  make a written request to the Trustee to
          pursue a remedy;

               (c) such Holder or Holders  offer and, if  requested,  provide to
          the Trustee indemnity  reasonably  satisfactory to the Trustee against
          any loss, liability or expense;

               (d) the Trustee  does not comply with the request  within 15 days
          after  receipt  of the  request  and  the  offer  and,  if  requested,
          provision of indemnity by the Holders; and

               (e)  during  such  15-day  period the  Holders  of a majority  in
          aggregate  principal amount of the outstanding  Securities do not give
          the Trustee a written direction inconsistent with the request.

     The foregoing  limitations shall not apply to a suit instituted by a Holder
for the enforcement of the payment of principal of, premium,  if any, or accrued
interest on such Security on or after the respective due dates set forth in such
Security.

     A  Securityholder  may not use this  Indenture to  prejudice  the rights of
another  Securityholder  or to obtain a preference  or priority  over such other
Securityholder.
<PAGE>

     SECTION 6.7  Rights of Holders To Receive Payment.
                  ------------------------------------

     Notwithstanding  any other  provision of this  Indenture,  the right of any
Holder to receive  payment of principal of,  premium,  if any, and interest on a
Security,  on or after the respective due dates expressed in the Security, or to
bring suit for the  enforcement of any such payment on or after such  respective
dates,  is  absolute  and  unconditional  and shall not be  impaired or affected
without the consent of such Holder.

     SECTION 6.8  Collection Suit by Trustee.
                  --------------------------

     If an Event of Default specified in Section 6.1(a)(i) or (ii) occurs and is
continuing,  the Trustee may recover  judgment in its own name and as trustee of
an express trust against the Company, the Guarantors or any other obligor on the
Securities  for the whole amount of  principal  and accrued  interest  remaining
unpaid,  together  with  interest  overdue on principal  and, to the extent that
payment  of such  interest  is  lawful,  interest  on  overdue  installments  of
interest,  in each case at the Interest Rate and such further amount as shall be
sufficient to cover the costs and expenses of collection, including all sums due
and owing to the Trustee pursuant to Section 7.7 hereof.

     SECTION 6.9  Trustee May File Proofs of Claim.
                  --------------------------------

     The Trustee  shall be entitled  and  empowered to file such proofs of claim
and other  papers or documents as may be necessary or advisable in order to have
the claims of the Trustee (including any claim for the reasonable  compensation,
expenses, disbursements and advances of the Trustee, its agents and counsel) and
the Securityholders allowed in any judicial proceedings relative to the Company,
the  Subsidiaries of the Company or any Guarantor (or any other obligor upon the
Securities),  their  respective  creditors or property and shall be entitled and
empowered  to  collect  and  receive  any  monies or other  property  payable or
deliverable  on any such claims and to distribute the same, and any Custodian in
any such judicial  proceedings is hereby  authorized by each  Securityholder  to
make such  payments  to the Trustee  and,  in the event that the  Trustee  shall
consent to the making of such payments directly to the  Securityholders,  to pay
to the Trustee any amounts due the Trustee  under  Section 7.7.  Nothing  herein
contained shall be deemed to authorize the Trustee to authorize or consent to or
accept  or adopt on  behalf of any  Securityholder  any plan of  reorganization,
arrangement, adjustment or composition affecting the Securities or the rights of
any Holder thereof,  or to authorize the Trustee to vote in respect of the claim
of any Securityholder in any such proceeding.
<PAGE>

     SECTION 6.10  Priorities.
                   ----------

     If the Trustee collects any money pursuant to this Article VI, it shall pay
out such money in the following order:

               First: to the Trustee for amounts due under Section 7.7;

               Second:  to  Holders  for  interest  accrued  on the  Securities,
          ratably,  without preference or priority of any kind, according to the
          amounts due and payable on the Securities for interest;

               Third:   to  Holders  for  principal   amounts  owing  under  the
          Securities,  ratably,  without  preference  or  priority  of any kind,
          according  to the  amounts  due  and  payable  on the  Securities  for
          principal; and

               Fourth: to the Company or, to the extent the Trustee collects any
          amount pursuant to Article X from any Guarantor, to such Guarantor.

     The Trustee,  upon prior  written  notice to the Company,  may fix a record
date and  payment  date for any  payment  to  Securityholders  pursuant  to this
Section 6.10.

     SECTION 6.11  Undertaking for Costs.
                   ---------------------

     In any suit for the enforcement of any right or remedy under this Indenture
or in any suit  against  the  Trustee  for any action  taken or omitted by it as
Trustee,  a court in its discretion may require the filing by any party litigant
in the suit of an undertaking to pay the costs of the suit, and the court in its
discretion may assess reasonable costs,  including  reasonable  attorneys' fees,
against any party litigant in the suit, having due regard to the merits and good
faith of the claims or defenses  made by the party  litigant.  This Section 6.11
does not apply to a suit by the Trustee,  a suit by a Holder pursuant to Section
6.7, or a suit by Holders of more than 10% in aggregate  principal amount of the
outstanding Securities.

                                   ARTICLE VII


                                     TRUSTEE
                                     -------

     SECTION 7.1  Duties of Trustee.
                  -----------------

     (a) If a Trust Officer of the Trustee has received  written  notice that an
Event of Default has occurred and is continuing, the Trustee shall exercise such
of the rights and powers vested in it by this  Indenture and use the same degree
of care and skill in their  exercise as a prudent  person would  exercise or use
under the circumstances in the conduct of his own affairs.
<PAGE>

     (b) Except during the continuance of an Event of Default  actually known to
the Trustee:

               (i)  The  Trustee   need   perform   only  those  duties  as  are
          specifically  set forth in this Indenture and no others and no implied
          covenants or obligations shall be read into this Indenture against the
          Trustee.

               (ii) In the  absence of bad faith on its part,  the  Trustee  may
          conclusively  rely,  as  to  the  truth  of  the  statements  and  the
          correctness of the opinions  expressed  therein,  upon certificates or
          opinions  furnished to the Trustee and conforming to the  requirements
          of this Indenture.  However,  in the case of any such  certificates or
          opinions which by any provision hereof are specifically required to be
          furnished to the Trustee,  the Trustee shall examine such certificates
          and  opinions  to  determine  whether  or  not  they  conform  to  the
          requirements  of this  Indenture  but need  not  verify  the  contents
          thereof.

     (c) The Trustee may not be relieved  from  liability  for its own negligent
action, its own negligent failure to act, or its own willful misconduct,  except
that:

               (i) This  paragraph does not limit the effect of paragraph (b) of
          this Section 7.1.

               (ii) The  Trustee  shall not be liable for any error of  judgment
          made in good faith by a Trust  Officer,  unless it is proved  that the
          Trustee was negligent in ascertaining the pertinent facts.

               (iii) The Trustee  shall not be liable with respect to any action
          it takes or omits to take in good faith in accordance with a direction
          received by it pursuant to Section 6.5.

     (d) No provision of this  Indenture  shall require the Trustee to expend or
risk its own funds or otherwise incur any financial liability in the performance
of any of its duties hereunder or in the exercise of any of its rights or powers
if it shall have  reasonable  grounds for believing that repayment of such funds
or reasonable indemnity against such risk or liability is not reasonably assured
to it.

     (e)  Every  provision  of this  Indenture  that in any way  relates  to the
Trustee is subject to paragraphs (a), (b), (c), (d), (f) and (g) of this Section
7.1.

     (f) The Trustee  shall not be liable for interest on any money  received by
it except as the Trustee may agree in writing with the Company or any Guarantor.
Money held in trust by the  Trustee  need not be  segregated  from  other  funds
except to the extent required by law.

     (g) The Trustee  may refuse to perform  any duty or  exercise  any right or
power unless it is provided adequate funds to enable it to do so and it receives
indemnity  reasonably  satisfactory  to it against any loss,  liability,  fee or
expense.
<PAGE>

     SECTION 7.2  Rights of Trustee.
                  -----------------

     Subject to Section 7.1:

               (a) The  Trustee  may rely and  shall be  protected  in acting or
          refraining from acting upon any document  believed by it to be genuine
          and to have been signed or presented by the proper Person. The Trustee
          shall not be bound to make any investigation into the facts or matters
          stated in any resolution, certificate, statement, instrument, opinion,
          report, notice, request,  direction,  consent, order, bond, debenture,
          note,  other evidence of indebtedness or other paper or document,  but
          the  Trustee,  in its  discretion,  may make such  further  inquiry or
          investigation  into such facts or matters as it may see fit,  and,  if
          the  Trustee  shall   determine  to  make  such  further   inquiry  or
          investigation,  it shall be entitled to examine the books, records and
          premises of the Company or any  Guarantor,  personally  or by agent or
          attorney.

               (b) Before the Trustee acts or refrains  from acting with respect
          to any  matter  contemplated  by this  Indenture,  it may  require  an
          Officers' Certificate or an Opinion of Counsel, which shall conform to
          the  provisions of Section  11.5.  The Trustee shall not be liable for
          any action it takes or omits to take in good faith in reliance on such
          certificate or opinion.

               (c) The  Trustee may act  through  its  attorneys  and agents and
          shall not be responsible for the misconduct or negligence of any agent
          (other than the negligence or willful misconduct of an agent who is an
          employee of the Trustee) appointed with due care.

               (d) The  Trustee  shall not be liable  for any action it takes or
          omits  to  take in good  faith  which  it  reasonably  believes  to be
          authorized or within its rights or powers, provided that the Trustee's
          conduct does not constitute negligence or bad faith.

               (e) Before  taking or  refraining  from  taking any  action,  the
          Trustee  may  consult  with  counsel and the advice or opinion of such
          counsel as to matters of law shall be full and complete  authorization
          and protection from liability in respect of any action taken,  omitted
          or suffered by it hereunder in good faith and in  accordance  with the
          advice or opinion of such counsel.

     SECTION 7.3  Individual Rights of Trustee.
                  ----------------------------

     The Trustee in its individual capacity or any other capacity may become the
owner or pledgee of  Securities  and may  otherwise  deal with the Company,  any
Guarantor or their  respective  Subsidiaries and Affiliates with the same rights
it would  have if it were not  Trustee.  Any  Agent  may do the same  with  like
rights. However, the Trustee is subject to Sections 7.10 and 7.11.
<PAGE>

     SECTION 7.4  Trustee's Disclaimer.
                  --------------------

     The Trustee shall not be responsible for and makes no  representation as to
the validity or adequacy of this Indenture, the Securities or the Guarantees and
it shall not be  accountable  for the  Company's or any  Guarantor's  use of the
proceeds from the issuance of the  Securities,  and it shall not be  responsible
for any  statement  of the  Company  or any  Guarantor  in this  Indenture,  the
Guarantee or any document  issued in  connection  with the sale of Securities or
any  statement  in the  Securities  other  than  the  Trustee's  certificate  of
authentication.

     SECTION 7.5  Notice of Defaults.
                  ------------------

     If a Default or an Event of Default with respect to the  Securities  occurs
and is  continuing  and is known to the Trustee,  the Trustee shall mail to each
Securityholder  notice of the  Default or Event of Default  within 90 days after
the occurrence  thereof.  Except in the case of a Default or an Event of Default
in payment of principal of or interest on any Security, the Trustee may withhold
the notice to the  Securityholders  if a committee of its Trust Officers in good
faith   determines   that   withholding   the  notice  is  in  the  interest  of
Securityholders.

     SECTION 7.6  Reports by Trustee to Holders.
                  -----------------------------

     To the extent required by TIA Section 313(a), within 60 days after each May
15  commencing  with  May 15,  1997  and for as long  as  there  are  Securities
outstanding  hereunder,  the  Trustee  shall  mail  to each  Securityholder  the
Company's  brief  report  dated as of such date that  complies  with TIA Section
313(a).  The Trustee also shall  comply with TIA Section  313(b) and TIA Section
313(c)  and  (d).  A  copy  of  such  report  at the  time  of  its  mailing  to
Securityholders  shall  be  filed  with the SEC,  if  required,  and each  stock
exchange, if any, on which the Securities are listed.

     The Company  shall  promptly  notify the Trustee if the  Securities  become
listed on any stock  exchange,  and the  Trustee  shall  comply with TIA Section
313(d).

     SECTION 7.7  Compensation and Indemnity.
                  --------------------------

     The Company and the Guarantors  shall pay to the Trustee,  the Paying Agent
and the Registrar from time to time reasonable compensation for their respective
services  rendered  hereunder.   The  Trustee's,  the  Paying  Agent's  and  the
Registrar's  compensation  shall not be limited by any law on  compensation of a
trustee of an express trust.  The Company and the Guarantors shall reimburse the
Trustee,  the Paying Agent and the  Registrar  upon  request for all  reasonable
out-of-pocket disbursements,  expenses and advances (including fees and expenses
of counsel) incurred or made by each of them in addition to the compensation for
their   respective   services.   Such  expenses  shall  include  the  reasonable
compensation,  out-of-pocket  disbursements  and expenses of the Trustee's,  the
Paying Agent's and the Registrar's agents and counsel.
<PAGE>

     The Company and the  Guarantors  shall  indemnify  the Trustee,  the Paying
Agent and the Registrar for, and hold each of them harmless against,  any claim,
demand,  expense  (including  but not limited to attorneys'  fees and expenses),
loss or liability  incurred by each of them arising out of or in connection with
the administration of this Indenture and their respective duties hereunder. Each
of the Trustee,  the Paying Agent and the Registrar shall notify the Company and
the Guarantors  promptly of any claim asserted  against it for which it may seek
indemnity. However, failure by the Trustee, the Paying Agent or the Registrar to
so notify the  Company and the  Guarantors  shall not relieve the Company or any
Guarantor of its obligations hereunder.  The Company and the Guarantors need not
reimburse any expense or indemnify against any loss or liability incurred by the
Trustee,  the Paying Agent or the Registrar  through the  Trustee's,  the Paying
Agent's  or the  Registrar's,  as the  case  may  be,  own  willful  misconduct,
negligence or bad faith.

     To secure the Company's and the  Guarantors'  payment  obligations  in this
Section 7.7, each of the Trustee,  the Paying Agent and the Registrar shall have
a lien prior to the Securities on all money or property held or collected by it,
in its  capacity  as Trustee,  Paying  Agent or  Registrar,  as the case may be,
except  money or  property  held in trust to pay  principal  of or  interest  on
particular  Securities.  Such lien and indemnity shall survive the satisfaction,
discharge  and  termination  of this  Indenture,  including the  termination  or
rejection hereof in any bankruptcy proceeding.

     When any of the Trustee, the Paying Agent and the Registrar incurs expenses
or renders services after an Event of Default  specified in Section  6.1(a)(vii)
or (viii)  occurs,  the  expenses  and the  compensation  for the  services  are
intended to constitute expenses of administration under any Bankruptcy Law.

     SECTION 7.8  Replacement of Trustee.
                  ----------------------

     The  Trustee  may resign at any time by so  notifying  the  Company and the
Guarantors in writing,  such resignation to be effective upon the appointment of
a  successor  Trustee.  The  Holders of a majority  in  principal  amount of the
outstanding  Securities  may remove the Trustee by so  notifying  the Trustee in
writing and may appoint a successor  Trustee with the Company's  consent,  which
consent shall not be unreasonably  withheld.  The Company may remove the Trustee
if:

               (a) the Trustee fails to comply with Section 7.10;

               (b) the Trustee is adjudged a bankrupt or an insolvent;

               (c) a  receiver  or other  public  officer  takes  charge  of the
          Trustee or its property; or

               (d) the Trustee becomes incapable of acting.
<PAGE>

     If the Trustee  resigns or is removed or if a vacancy  exists in the office
of the  Trustee  for any reason  (the  Trustee in such event  being  referred to
herein as the retiring  Trustee),  the Company and the Guarantors shall promptly
appoint a successor  Trustee.  Within one year after the successor Trustee takes
office,  the Holders of a majority in  principal  amount of the  Securities  may
appoint a successor  Trustee to replace the successor  Trustee  appointed by the
Company.

     A successor  Trustee shall deliver a written  acceptance of its appointment
to the retiring Trustee and to the Company. Immediately after that, the retiring
Trustee  shall  transfer  all  property  held by it as Trustee to the  successor
Trustee  (subject  to the lien  provided in Section  7.7),  the  resignation  or
removal of the  retiring  Trustee  shall  become  effective,  and the  successor
Trustee  shall have all the rights,  powers and duties of the Trustee under this
Indenture.  A  successor  Trustee  shall mail notice of its  succession  to each
Securityholder.

     If a  successor  Trustee  does not take  office  within  60 days  after the
retiring Trustee resigns or is removed, the retiring Trustee, the Company or the
Holders of at least 25% in principal  amount of the  outstanding  Securities may
petition any court of competent  jurisdiction for the appointment of a successor
Trustee.

     If the Trustee fails to comply with Section 7.10,  any  Securityholder  may
petition any court of competent  jurisdiction for the removal of the Trustee and
the appointment of a successor Trustee.

     Notwithstanding  replacement  of the Trustee  pursuant to this Section 7.8,
the Company's and the Guarantors'  obligations  under Section 7.7 shall continue
for the benefit of the retiring Trustee.

     SECTION 7.9  Successor Trustee by Merger, Etc.
                  ---------------------------------

     If the Trustee consolidates with, merges or converts into, or transfers all
or substantially all of its corporate trust business to, another  corporation or
national banking association, the resulting, surviving or transferee corporation
or national banking  association  without any further act shall be the successor
Trustee,  provided such  corporation  shall be otherwise  qualified and eligible
under this Article VII.

     SECTION 7.10  Eligibility; Disqualification.
                   -----------------------------

     This Indenture  shall always have a Trustee who satisfies the  requirements
of TIA Section 310(a)(1), (2) and (5). The Trustee shall have a combined capital
and surplus of at least  $100,000,000 as set forth in its most recent  published
annual  report of condition.  The Trustee shall comply with TIA Section  310(b);
provided,  however,  that there  shall be  excluded  from the  operation  of TIA
Section 310(b)(1) any indenture or indentures under which other  securities,  or
certificates of interest or  participation in other  securities,  of the Company
are outstanding if the  requirements for such exclusion set forth in TIA Section
310(b)(1) are met. The provisions of TIA Section 310 shall apply to the Company,
as obligor of the Securities.

     SECTION 7.11  Preferential Collection of Claims Against Company.
                   -------------------------------------------------

     The Trustee  shall comply with TIA Section  311(a),  excluding any creditor
relationship  listed in TIA Section  311(b).  A Trustee who has resigned or been
removed shall be subject to TIA Section 311(a) to the extent indicated  therein.
The provisions of TIA Section 311 shall apply to the Company and each Guarantor,
as obligors on the Securities.
<PAGE>

                                  ARTICLE VIII


                       DISCHARGE OF INDENTURE; DEFEASANCE
                       ----------------------------------

     SECTION 8.1  Termination of Company's Obligations.
                  ------------------------------------

     The Company may terminate its  obligations  under the  Securities  and this
Indenture,  and the obligations of the Guarantors shall terminate,  except those
obligations referred to in the penultimate paragraph of this Section 8.1, if all
Securities previously authenticated and delivered (other than destroyed, lost or
stolen  Securities  which have been  replaced or paid and  Securities  for whose
payment money has  heretofore  been deposited in trust or segregated and held in
trust by the Company and  thereafter  repaid to the Company or  discharged  from
such trust) have been delivered to the Trustee for  cancellation and the Company
has paid all sums payable by it hereunder, or if:

               (a) pursuant to Article III, the Company  shall have given notice
          to the Trustee and mailed a notice of redemption to each Holder of the
          redemption of all of the Securities under arrangements satisfactory to
          the Trustee for the giving of such notice;

               (b) the Company shall have irrevocably  deposited or caused to be
          deposited with the Trustee or a trustee  satisfactory  to the Trustee,
          under  the  terms  of an  irrevocable  trust  agreement  in  form  and
          substance  satisfactory to the Trustee, as trust funds in trust solely
          for the  benefit  of the  Holders  for that  purpose,  money or direct
          non-callable  obligations of, or non-callable  obligations  guaranteed
          by, the United States of America for the payment of which guarantee or
          obligation  the full faith and credit of the United  States is pledged
          ("U.S. Government  Obligations") maturing as to principal and interest
          in  such  amounts  and  at  such  times  as  are  sufficient   without
          consideration of any  reinvestment of such interest,  to pay principal
          of and  interest  on  the  outstanding  Securities  to  redemption  as
          certified  to  the  Trustee  by  a  nationally   recognized   firm  of
          independent  public  accountants  designated by the Company,  provided
          that the Trustee shall have been irrevocably  instructed to apply such
          money or the  proceeds  of such  U.S.  Government  Obligations  to the
          payment of said principal and interest with respect to the Securities;
          and

               (c) the Company shall have  delivered to the Trustee an Officers'
          Certificate  and  an  Opinion  of  Counsel,   each  stating  that  all
          conditions  precedent  providing for the  termination of the Company's
          and the Guarantors' obligation under the Securities and this Indenture
          have been complied with.
<PAGE>

     Notwithstanding the foregoing paragraph,  the Company's  obligations and to
the extent  applicable,  the Guarantor's  obligations in Sections 2.5, 2.6, 2.7,
2.8, 4.1,  4.2,  7.7, 7.8, 8.4, 8.5 and 10.1 shall survive until the  Securities
are no longer outstanding.  After the Securities are no longer outstanding,  the
Company's obligations and to the extent applicable,  the Guarantor's obligations
in Sections 7.7, 8.4 and 8.5 shall survive.

     After such delivery or  irrevocable  deposit the Trustee upon request shall
acknowledge  in writing  the  discharge  of the  Company's  and the  Guarantors'
obligations  under the Securities and this Indenture  except for those surviving
obligations specified above.

     SECTION 8.2  Legal Defeasance and Covenant Defeasance.
                  ----------------------------------------

     (a) The Company may, at its option by Board  Resolution,  at any time, with
respect to the Securities,  elect to have either  paragraph (b) or paragraph (c)
below  be  applied  to the  outstanding  Securities  upon  compliance  with  the
conditions set forth in paragraph (d).

     (b)  Upon  the  Company's  exercise  under  paragraph  (a)  of  the  option
applicable  to this  paragraph  (b),  the  Company  shall be deemed to have been
released and discharged  from its  obligations  with respect to the  outstanding
Securities   on  the  date  the   conditions   set  forth  below  are  satisfied
(hereinafter, "legal defeasance"). For this purpose, such legal defeasance means
that the  Company  shall  be  deemed  to have  paid and  discharged  the  entire
indebtedness  represented by the outstanding Securities,  which shall thereafter
be deemed to be  "outstanding"  only for the purposes of paragraph (e) below and
the other  Sections of and matters under this  Indenture  referred to in (i) and
(ii)  below,  and to  have  satisfied  all  its  other  obligations  under  such
Securities and this Indenture  insofar as such Securities are concerned (and the
Trustee,  at the  expense  of the  Company,  shall  execute  proper  instruments
acknowledging  the same),  except for the  following  which shall  survive until
otherwise  terminated  or  discharged  hereunder:  (i) the  rights of Holders of
outstanding  Securities  to  receive  solely  from the trust fund  described  in
paragraph (d) below and as more fully set forth in such  paragraph,  payments in
respect of the principal of and interest on such  Securities  when such payments
are due,  (ii) the  Company's  obligations  and to the  extent  applicable,  the
Guarantor's obligations with respect to such Securities under Sections 2.5, 2.6,
2.7, 2.8, 4.2, 7.7, 7.8, 8.4 and 8.5, (iii) the rights,  powers,  trusts, duties
and  immunities of the Trustee  hereunder and (iv) this Section 8.2.  Subject to
compliance with this Section 8.2, the Company may exercise its option under this
paragraph (b)  notwithstanding  the prior exercise of its option under paragraph
(c) below with respect to the Securities.
<PAGE>

     (c)  Upon  the  Company's  exercise  under  paragraph  (a)  of  the  option
applicable to this paragraph  (c), the Company and to the extent  applicable the
Guarantors  shall be released and discharged  from their  obligations  under any
covenant contained in Article V and in Sections 4.6 through 4.21 with respect to
the outstanding  Securities on and after the date the conditions set forth below
are satisfied  (hereinafter,  "covenant  defeasance"),  and the Securities shall
thereafter be deemed to be not  "outstanding"  for the purpose of any direction,
waiver,  consent or declaration or act of Holders (and the  consequences  of any
thereof) in  connection  with such  covenants,  but shall  continue to be deemed
"outstanding" for all other purposes hereunder.  For this purpose, such covenant
defeasance means that, with respect to the outstanding  Securities,  the Company
and any Guarantor may omit to comply with and shall have no liability in respect
of any term,  condition or limitation  set forth in any such  covenant,  whether
directly or indirectly,  by reason of any reference elsewhere herein to any such
covenant  or by  reason  of any  reference  in any such  covenant  to any  other
provision  herein or in any other document and such omission to comply shall not
constitute a Default or an Event of Default under  Section 6.1,  but,  except as
specified  above,  the remainder of this Indenture and such Securities  shall be
unaffected thereby.

     (d)  The  following  shall  be the  conditions  to  application  of  either
paragraph (b) or paragraph (c) above to the outstanding Securities:

               (i) the Company shall  irrevocably have deposited or caused to be
          deposited  with the Trustee as trust funds in trust for the purpose of
          making the following payments,  specifically  pledged as security for,
          and  dedicated   solely  to,  the  benefit  of  the  Holders  of  such
          Securities, (A) money in an amount, or (B) U.S. Government Obligations
          which  through the  scheduled  payment of principal of and interest in
          respect thereof in accordance with their terms will provide, not later
          than one day before the due date of any  payment,  money in an amount,
          or  (C)  a  combination  thereof,  sufficient,  in  the  opinion  of a
          nationally recognized firm of independent public accountants expressed
          in a written  certification  thereof delivered to the Trustee,  to pay
          and  discharge  and which  shall be applied by the  Trustee  (or other
          qualifying  trustee) to pay and discharge  principal of,  premium,  if
          any, and interest on the  outstanding  Securities on the Maturity Date
          of  such   principal  or  installment  of  principal  or  interest  in
          accordance  with the terms of this  Indenture and of such  Securities;
          provided,  however,  that the  Trustee (or other  qualifying  trustee)
          shall have  received  an  irrevocable  written  order from the Company
          instructing  the Trustee (or other  qualifying  trustee) to apply such
          money or the  proceeds  of such U.S.  Government  Obligations  to said
          payments with respect to the Securities;

               (ii) no Default or Event of Default or event which with notice or
          lapse of time or both  would  become a Default  or an Event of Default
          with respect to the  Securities  shall have occurred and be continuing
          on the date of such deposit or,  insofar as Sections  6.1(a)(vii)  and
          (viii) are concerned, at any time during the period ending on the 91st
          day after the date of such  deposit  (it  being  understood  that this
          condition  shall not be deemed  satisfied until the expiration of such
          period);

               (iii) such legal  defeasance  or  covenant  defeasance  shall not
          result in a breach or violation  of, or  constitute a Default or Event
          of Default under,  this Indenture or any other agreement or instrument
          to which the Company is a party or by which it is bound;
<PAGE>

               (iv) in the case of an election  under  paragraph (b) above,  the
          Company  shall  have  delivered  to the  Trustee an Opinion of Counsel
          stating  that (x) the Company  has  received  from,  or there has been
          published by, the Internal  Revenue  Service a ruling or (y) since the
          date of this  Indenture,  there  has been a change  in the  applicable
          Federal  income tax law, in either case to the effect that,  and based
          thereon  such  opinion  shall   confirm  that,   the  Holders  of  the
          outstanding  Securities  will not recognize  income,  gain or loss for
          Federal  income tax purposes as a result of such legal  defeasance and
          will be subject to Federal income tax on the same amounts, in the same
          manner and at the same times as would have been the case if such legal
          defeasance had not occurred;

               (v) in the case of an election  under  paragraph  (c) above,  the
          Company  shall have  delivered to the Trustee an Opinion of Counsel to
          the effect that the  Holders of the  outstanding  Securities  will not
          recognize  income,  gain or loss for Federal  income tax purposes as a
          result of such  covenant  defeasance  and will be  subject  to Federal
          income  tax on the same  amounts,  in the same  manner and at the same
          times as would have been the case if such covenant  defeasance had not
          occurred;

               (vi) in the case of an election under either paragraph (b) or (c)
          above,  an Opinion of Counsel to the effect that,  (x) the trust funds
          will not be subject to any rights of any other holders of Indebtedness
          of the Company,  and (y) after the 91st day following the deposit, the
          trust  funds  will not be  subject  to the  effect  of any  applicable
          Bankruptcy Law; provided,  however, that if a court were to rule under
          any such law in any case or proceeding  that the trust funds  remained
          property of the Company, no opinion needs to be given as to the effect
          of such laws on the trust funds  except the  following:  (A)  assuming
          such trust funds  remained in the Trustee's  possession  prior to such
          court  ruling to the extent not paid to  Holders  of  Securities,  the
          Trustee  will hold,  for the benefit of the Holders of  Securities,  a
          valid and  enforceable  security  interest in such trust funds that is
          not avoidable in  bankruptcy or otherwise,  subject only to principles
          of  equitable  subordination,  (B) the Holders of  Securities  will be
          entitled to receive  adequate  protection  of their  interests in such
          trust funds if such trust funds are used, and (C) no property,  rights
          in property or other  interests  granted to the Trustee or the Holders
          of  Securities  in exchange  for or with  respect to any of such funds
          will be subject to any prior rights of any other Person,  subject only
          to  prior  Liens  granted  under  Section  364 of Title 11 of the U.S.
          Bankruptcy Code (or any section of any other Bankruptcy Law having the
          same effect), but still subject to the foregoing clause (B); and

               (vii)  the  Company  shall  have  delivered  to  the  Trustee  an
          Officers' Certificate and an Opinion of Counsel, each stating that (A)
          all  conditions  precedent  provided  for relating to either the legal
          defeasance under paragraph (b) above or the covenant  defeasance under
          paragraph  (c) above,  as the case may be, have been complied with and
          (B)  if  any  other   Indebtedness   of  the  Company  shall  then  be
          outstanding,  such legal  defeasance or covenant  defeasance  will not
          violate the  provisions of the  agreements or  instruments  evidencing
          such Indebtedness.
<PAGE>

     (e) All money  and U.S.  Government  Obligations  (including  the  proceeds
thereof) deposited with the Trustee (or other qualifying  trustee,  collectively
for purposes of this  paragraph  (e), the  "Trustee")  pursuant to paragraph (d)
above in  respect  of the  outstanding  Securities  shall  be held in trust  and
applied by the Trustee, in accordance with the provisions of such Securities and
this  Indenture,  to the  payment,  either  directly or through any Paying Agent
(other than the Company, any Guarantor or any of their respective Affiliates) as
the Trustee may determine, to the Holders of such Securities of all sums due and
to become due thereon in respect of principal and interest,  but such money need
not be segregated from other funds except to the extent required by law.

     The Company  shall pay and  indemnify  the Trustee  against any tax, fee or
other  charge  imposed on or assessed  against the U.S.  Government  Obligations
deposited pursuant to paragraph (d) above or the principal and interest received
in respect  thereof other than any such tax, fee or other charge which by law is
for the account of the Holders of the outstanding Securities.

     Anything in this Section 8.2 to the contrary  notwithstanding,  the Trustee
shall  deliver  or pay to the  Company  from time to time upon the  request,  in
writing, by the Company any money or U.S.  Government  Obligations held by it as
provided in paragraph (d) above which, in the opinion of a nationally recognized
firm of  independent  public  accountants  expressed in a written  certification
thereof  delivered to the  Trustee,  are in excess of the amount  thereof  which
would then be required to be deposited to effect an equivalent  legal defeasance
or covenant defeasance.

     SECTION 8.3  Application of Trust Money.
                  --------------------------

     The  Trustee  shall  hold in  trust  money or U.S.  Government  Obligations
deposited  with it  pursuant  to  Sections  8.1 and 8.2,  and  shall  apply  the
deposited  money and the money from U.S.  Government  Obligations  in accordance
with this  Indenture  to the  payment of  principal  of,  premium,  if any,  and
interest on the Securities.

     SECTION 8.4  Repayment to Company or Guarantors.
                  ----------------------------------

     Subject to Sections 7.7, 8.1 and 8.2, the Trustee shall promptly pay to the
Company, or if deposited with the Trustee by the Guarantors,  to the Guarantors,
upon  receipt by the  Trustee of an  Officers'  Certificate,  any excess  money,
determined  in  accordance  with  Sections  8.2(d)(i) and (e), held by it at any
time.  The  Trustee  and  the  Paying  Agent  shall  pay to the  Company  or the
Guarantors, as the case may be, upon receipt by the Trustee or the Paying Agent,
as the case may be, of an  Officers'  Certificate,  any money held by it for the
payment of principal or interest that remains unclaimed for two years; provided,
however, that the Trustee and the Paying Agent before being required to make any
payment may,  but need not, at the expense of the Company  cause to be published
once in a newspaper  of general  circulation  in The City of New York or mail to
each Holder entitled to such money notice that such money remains  unclaimed and
that after a date  specified  therein,  which shall be at least 30 days from the
date of such  publication or mailing,  any unclaimed  balance of such money then
remaining  will be repaid to the  Company.  After  payment to the Company or the
Guarantors,  as the case may be,  Securityholders  entitled  to money  must look
solely to the Company or the Guarantors for payment as general  creditors unless
an  applicable  abandoned  property  law  designates  another  Person,  and  all
liability  of the  Trustee  or Paying  Agent with  respect  to such money  shall
thereupon cease.
<PAGE>

     SECTION 8.5  Reinstatement.
                  -------------

     If the  Trustee  or  Paying  Agent is  unable  to apply  any  money or U.S.
Government  obligations in accordance with this Indenture by reason of any legal
proceeding  or by reason of any order or judgment  of any court or  governmental
authority enjoining, restraining or otherwise prohibiting such application, then
and only  then  the  Company's  and  each  Guarantor's  obligations  under  this
Indenture  and the  Securities  shall be  revived  and  reinstated  as though no
deposit had been made pursuant to this Indenture  until such time as the Trustee
is  permitted  to  apply  all  such  money  or U.S.  Government  Obligations  in
accordance with this Indenture;  provided,  however,  that if the Company or the
Guarantors  have made any payment of interest on or principal of any  Securities
because  of  the  reinstatement  of  their  obligations,   the  Company  or  the
Guarantors, as the case may be, shall be subrogated to the rights of the holders
of such  Securities  to receive such  payment from the money or U.S.  Government
Obligations held by the Trustee or Paying Agent.

                                   ARTICLE IX


                       AMENDMENTS, SUPPLEMENTS AND WAIVERS
                       -----------------------------------

     SECTION 9.1  Without Consent of Holders.
                  --------------------------

     The Company and the Guarantors,  when  authorized by a Board  Resolution of
each of them, and the Trustee may amend,  waive or supplement  this Indenture or
the Securities without notice to or consent of any Securityholder:

               (a) to cure any ambiguity, defect or inconsistency;

               (b) to provide for uncertificated Securities in addition to or in
          place of certificated Securities;

               (c) to comply with any requirements of the SEC under the TIA;

               (d) to evidence  the  succession  in  accordance  with  Article V
          hereof  of  another  Person  to the  Company  or a  Guarantor  and the
          assumption  by any such  successor  of the  covenants  of the  Company
          herein and in the Securities;

               (e) to provide for an additional Guarantor as required by Section
          4.19;

               (f) to evidence  and provide for the  acceptance  of  appointment
          hereunder  by a separate  or  successor  Trustee  with  respect to the
          Securities; or

               (g) to make any change that does not adversely  affect the rights
          of any Holder.
<PAGE>

     SECTION 9.2  With Consent of Holders.
                  -----------------------

     Subject to Section 6.7 and the provisions of this Section 9.2, the Company,
the  Guarantors  and the Trustee may amend or supplement  this  Indenture or the
Securities  with the written  consent of the Holders of not less than a majority
in aggregate  principal  amount of the Securities then  outstanding.  Subject to
Section  6.7 and the  provisions  of this  Section  9.2,  the Holders of, in the
aggregate,  not less  than a  majority  in  aggregate  principal  amount  of the
outstanding  Securities  affected  may waive  compliance  by the  Company or any
Guarantor with any provision of this Indenture or the Securities  without notice
to any other Securityholder. However, without the consent of each Securityholder
affected,  an amendment,  supplement or waiver,  including a waiver  pursuant to
Section 6.4, may not:

               (a) reduce the  percentage  in principal  amount  outstanding  of
          Securities necessary for consent to an amendment, supplement or waiver
          of any  provision  of this  Indenture  or the  Securities  or who must
          consent to take any action under the Securities,  the Guarantee or the
          Indenture;

               (b)  reduce  the rate of, or  extend  the time  for,  payment  of
          interest on any Security;

               (c)  reduce the  principal  amount  outstanding  of or extend the
          fixed maturity of any Security or alter the redemption provisions with
          respect thereto;

               (d) waive a default in the payment of the principal of,  interest
          on, or redemption  payment or an offer to purchase required  hereunder
          with respect to, any Security;

               (e) make any Security  payable in currency other than that stated
          in the Security;

               (f) change the Company's  obligation to purchase  Securities upon
          the  occurrence  of a Change of  Control  (or  change  the  definition
          thereof) or an Asset Sale in accordance  with this  Indenture or waive
          any default in the performance thereof;

               (g) affect the ranking of the Securities or the Guarantees;

               (h) release any Guarantor from any of its  obligations  under its
          Guarantee except pursuant to Section 10.3;

               (i) impair the right to institute suit for the enforcement of any
          payment on or with respect to the Securities or the Guarantee; or

               (j) modify this Section 9.2 or Section 6.4.

     It shall not be necessary for the consent of the Holders under this Section
9.2 to approve the  particular  form of any proposed  amendment,  supplement  or
waiver,  but it shall be  sufficient  if such  consent  approves  the  substance
thereof.
<PAGE>

     After an  amendment,  supplement  or waiver  under this Section 9.2 becomes
effective,  the  Company  shall mail to the  Holders  affected  thereby a notice
briefly  describing  the  amendment,  supplement  or waiver.  Any failure of the
Company to mail such notice, or any defect therein,  shall not, however,  in any
way impair or affect the validity of any such amendment, supplement or waiver.

     SECTION 9.3  Compliance with Trust Indenture Act.
                  -----------------------------------

     Every amendment to or supplement of this Indenture or the Securities  shall
comply with the TIA as then in effect.

     SECTION 9.4  Revocation and Effect of Consents.
                  ---------------------------------

     Until an amendment or waiver becomes effective,  a written consent to it by
a Holder is a continuing  consent by the Holder and every  subsequent  Holder of
that Security or portion of that  Security  that  evidences the same debt as the
consenting Holder's Security, even if notation of the consent is not made on any
Security.  However,  any such Holder or subsequent Holder may revoke the consent
as to his Security or portion of a Security.  Such revocation shall be effective
only if the  Trustee  receives  the  notice of  revocation  before  the date the
amendment,  supplement or waiver becomes effective.  Notwithstanding  the above,
nothing in this  paragraph  shall impair the right of any  Securityholder  under
Section 316(b) of the TIA.

     The Company may,  but shall not be obligated  to, fix a record date for the
purpose of  determining  the  Holders  entitled  to  consent  to any  amendment,
supplement or waiver. If a record date is fixed, then notwithstanding the second
and third sentences of the immediately  preceding  paragraph,  those Persons who
were Holders at such record date (or their duly  designated  proxies),  and only
those  Persons,  shall be entitled to consent to such  amendment,  supplement or
waiver or to revoke any consent  previously  given,  whether or not such Persons
continue to be Holders  after such record date.  Such consent shall be effective
only for actions taken within 90 days after such record date.

     After an amendment,  supplement or waiver becomes effective,  it shall bind
every  Securityholder,  unless it makes a change described in any of clauses (a)
through (j) of Section 9.2; if it makes such a change, the amendment, supplement
or waiver  shall bind  every  subsequent  Holder of a  Security  or portion of a
Security that evidences the same debt as the consenting Holder's Security.

     SECTION 9.5  Notation on or Exchange of Securities.
                  -------------------------------------

     If an amendment,  supplement or waiver changes the terms of a Security, the
Trustee shall (in accordance with the specific written direction of the Company)
request  the Holder of the  Security to deliver it to the  Trustee.  The Trustee
shall (in accordance with the specific  written  direction of the Company) place
an appropriate notation on the Security about the changed terms and return it to
the Holder.  Alternatively,  if the Company or the  Trustee so  determines,  the
Company  in  exchange  for  the  Security  shall  issue  and the  Trustee  shall
authenticate a new Security that reflects the changed terms. Failure to make the
appropriate  notation or issue a new Security  shall not affect the validity and
effect of such amendment, supplement or waiver.
<PAGE>

     SECTION 9.6  Trustee To Sign Amendments, Etc.
                  --------------------------------

     The  Trustee  shall sign any  amendment,  supplement  or waiver  authorized
pursuant  to this  Article IX if the  amendment,  supplement  or waiver does not
adversely  affect the rights,  duties or immunities of the Trustee.  If it does,
the Trustee may, but need not, sign it. In signing any amendment,  supplement or
waiver,  the  Trustee  shall be  entitled  to  receive,  if it so  requests,  an
indemnity reasonably satisfactory to it, and shall be fully protected in relying
upon,  an  Opinion of  Counsel  stating  that the  execution  of any  amendment,
supplement  or waiver  authorized  pursuant to this Article IX is  authorized or
permitted by this Indenture and that any supplemental  indenture constitutes the
legal,  valid and binding  obligation of the Company and each of the Guarantors,
enforceable  against  each of them in  accordance  with its  terms  (subject  to
customary exceptions).  The Company may not sign an amendment until its Board of
Directors approves it.

                                    ARTICLE X


                             GUARANTEE ARRANGEMENTS
                             ----------------------

     SECTION 10.1  Guarantee.
                   ---------

     Each  Guarantor  hereby  jointly and  severally  unconditionally  and fully
guarantees (such guarantees collectively referred to as the "Guarantee") to each
Holder of a Security  authenticated  and  delivered  by the  Trustee  and to the
Trustee  and its  successors  and  assigns,  irrespective  of the  validity  and
enforceability  of this  Indenture,  the  Securities or the  obligations  of the
Company or any other  Guarantors  to the  Holders or the  Trustee  hereunder  or
thereunder, that: (a) the principal of, premium, if any, and any interest on the
Securities will be duly and punctually paid in full when due,  whether at stated
maturity,  by acceleration or otherwise,  and interest on the overdue  principal
and (to the extent permitted by law) interest, if any, on the Securities and all
other obligations of the Company or the Guarantors to the Holders or the Trustee
hereunder or  thereunder  (including  fees,  expenses or other) will be promptly
paid in full or performed,  all in accordance with the terms hereof and thereof;
and (b) in case of any extension of time of payment or renewal of any Securities
or any of such other  obligations,  the same will be promptly  paid in full when
due or  performed  in  accordance  with the terms of the  extension  or renewal,
whether at stated maturity,  by acceleration or otherwise.  Failing payment when
due of any amount so guaranteed,  or failing performance of any other obligation
of the Company to the  Holders,  for whatever  reason,  each  Guarantor  will be
obligated  to pay,  or to  perform  or cause the  performance  of,  without  the
necessity of action by the Trustee or any Holder, the same immediately. An Event
of Default under this Indenture or the Securities  shall  constitute an event of
default  under this  Guarantee,  and shall  entitle the Holders of Securities to
accelerate the obligations of the Guarantors hereunder in the same manner and to
the same extent as the obligations of the Company. Each of the Guarantors hereby
agrees that its obligations  hereunder shall be  unconditional,  irrespective of
the validity,  regularity or enforceability of the Securities or this Indenture,

<PAGE>

the  absence  of any action to  enforce  the same,  any waiver or consent by any
Holder of the Securities with respect to any provisions  hereof or thereof,  any
release  of any other  Guarantor,  the  recovery  of any  judgment  against  the
Company,  any action to enforce the same or any other  circumstance  which might
otherwise  constitute a legal or equitable  discharge or defense of a Guarantor.
Each of the Guarantors hereby agrees that its obligations hereunder constitute a
guarantee of payment and not of collection  and waives  diligence,  presentment,
demand of payment,  filing of claims with a court in the event of  insolvency or
bankruptcy of the Company,  any right to require a proceeding  first against the
Company,  protest,  notice and all demands  whatsoever  and  covenants  that its
Guarantee  will  not  be  discharged  except  by  complete  performance  of  the
obligations contained in the Securities,  this Indenture and this Guarantee.  If
any  Securityholder  or the  Trustee is required  by any court or  otherwise  to
return to the Company or to any Guarantor, or any custodian, trustee, liquidator
or other similar  official  acting in relation to the Company or such Guarantor,
any  amount  paid  by the  Company  or such  Guarantor  to the  Trustee  or such
Securityholder,  this Guarantee, to the extent theretofore discharged,  shall be
reinstated in full force and effect. All of the Guarantors agree that they shall
not be entitled to, and hereby  irrevocably  waive,  any right of subrogation in
relation to the  Securityholders or the Trustee,  as the case may be, in respect
of any obligations  guaranteed  hereby.  Each Guarantor  further agrees that, as
between it, on the one hand, and the Holders of Securities  and the Trustee,  on
the other hand,  (x) subject to this Article X, the maturity of the  obligations
guaranteed  hereby may be  accelerated  as provided in Article VI hereof for the
purposes  of this  Guarantee,  notwithstanding  any  stay,  injunction  or other
prohibition   preventing  such   acceleration  in  respect  of  the  obligations
guaranteed  hereby, and (y) in the event of any acceleration of such obligations
as  provided  in Article VI hereof,  such  obligations  (whether  or not due and
payable)  shall  forthwith  become  due and  payable by the  Guarantors  for the
purpose of this Guarantee. If acceleration of the time for payment of any amount
payable by the Company under this Indenture or the Securities is stayed upon the
insolvency,  bankruptcy  or  reorganization  of the  Company,  all such  amounts
subject to acceleration  under the terms of this Indenture shall  nonetheless be
payable by the Guarantors hereunder pursuant to the terms of this Article X.

     SECTION 10.2  Execution and Delivery of Guarantee.
                   -----------------------------------

     To further evidence the Guarantee set forth in Section 10.1, each Guarantor
hereby  agrees  that a notation  of such  Guarantee  shall be  endorsed  on each
Security  authenticated  and  delivered  by the Trustee  and  executed by either
manual or facsimile signature of two Officers of each Guarantor.

     Each of the  Guarantors  hereby  agrees  that its  Guarantee  set  forth in
Section 10.1 shall remain in full force and effect  notwithstanding  any failure
to endorse on each Security a notation of such Guarantee.

     If an Officer of a Guarantor  whose  signature  is on this  Indenture  or a
Security no longer holds that office at the time the Trustee  authenticates such
Security or at any time thereafter,  such Guarantor's Guarantee of such Security
shall be valid nevertheless.

     The  delivery of any  Security  by the  Trustee,  after the  authentication
thereof  hereunder,  shall constitute due delivery of any Guarantee set forth in
this Indenture on behalf of the Guarantor.
<PAGE>

     SECTION 10.3  Release of a Guarantor.
                   ----------------------

     Upon the sale or  disposition of all of the Capital Stock of a Guarantor by
the Company or a Subsidiary of the Company,  or upon the consolidation or merger
of a Guarantor with or into any Person (in each case,  other than to the Company
or an  Affiliate of the  Company),  such  Guarantor  will be  automatically  and
unconditionally  released  from all  obligations  under this Article X, provided
that (a)  immediately  before and after giving effect to such  transactions,  no
Default or Event of Default shall have  occurred and be  continuing  and (b) the
proceeds  received by the  Company or any  Subsidiary  of the Company  from such
transaction shall be applied as provided pursuant to Section 4.13.

     SECTION 10.4  Limitation of Guarantee.
                   -----------------------

     Each Guarantor,  and by its acceptance hereof each Holder,  hereby confirms
that it is the  intention  of all  such  parties  that  in no  event  shall  any
Guarantor's  obligations under its Guarantee constitute or result in a violation
of  any  applicable  fraudulent  conveyance  or  similar  law  of  any  relevant
jurisdiction.  Therefore,  in the event that the Guarantee  would,  but for this
sentence,  constitute  or result in such a violation,  then the liability of the
Guarantors  under the  Guarantee  shall be reduced to the  extent  necessary  to
eliminate such violation under the applicable  fraudulent  conveyance or similar
law.  Subject to the preceding  limitation  on liability,  the Guarantee of each
Guarantor  constitutes  a guarantee of payment in full when due and not merely a
guarantee of collectibility as further set forth in Section 10.1.

                                   ARTICLE XI


                                  MISCELLANEOUS
                                  -------------

     SECTION 11.1  Trust Indenture Act Controls.
                   ----------------------------

     If any provision of this  Indenture  limits,  qualifies,  or conflicts with
another provision which is required to be included in this Indenture by the TIA,
the required provision shall control.

     SECTION 11.2  Notices.
                   -------

     Any notice or communication  shall be sufficiently given only if in writing
and delivered in Person or mailed by first-class mail addressed as follows:

                  (a)      if to the Company or the Guarantors:

                           Renco Metals, Inc.
                           c/o Magnesium Corporation of America
                           238 North 2200 West
                           Salt Lake City, Utah  84116
                           Attention:  Ira Leon Rennert, Chairman
<PAGE>

                  (b)      if to the Trustee:

                           Fleet National Bank
                           777 Main Street
                           Hartford, Connecticut  06115
                           Attention:  Corporate Trust Administration

     The Company,  the  Guarantors or the Trustee by written notice to the other
may  designate  additional  or different  addresses  for  subsequent  notices or
communications.

     Any  notice or  communication  mailed to a  Securityholder,  including  any
notice delivered in connection with TIA Section 310(b),  TIA Section 313(c), TIA
Section  314(a)  and TIA  Section  315(b),  shall be mailed to him,  first-class
postage prepaid,  at his address as it appears on the registration  books of the
Registrar  and shall be  sufficiently  given to him if so mailed within the time
prescribed.

     Failure to mail a notice or communication to a Securityholder or any defect
in it shall not affect its  sufficiency  with respect to other  Securityholders.
Except for a notice to the Trustee, which is deemed given only when received, if
a notice or  communication  is mailed in the manner  provided  above, it is duly
given, whether or not the addressee receives it.

     SECTION 11.3  Communications by Holders with Other Holders.
                   --------------------------------------------

     Securityholders  may communicate  pursuant to TIA Section 312(b) with other
Securityholders  with  respect  to their  rights  under  this  Indenture  or the
Securities.  The Company,  the Trustee, the Registrar and any other Person shall
have the protection of TIA Section 312(c).

     SECTION 11.4  Certificate and Opinion of Counsel
                   as to Conditions Precedent.
                   ----------------------------------

     Upon any  request or  application  by the Company or any  Guarantor  to the
Trustee to take any action under this Indenture,  the Company or such Guarantor,
as the case may be,  shall  furnish to the Trustee at the request of the Trustee
(a) an Officers'  Certificate in form and substance  satisfactory to the Trustee
stating that, in the opinion of the signers, all conditions  precedent,  if any,
provided  for in this  Indenture  relating  to the  proposed  action  have  been
complied with, (b) an Opinion of Counsel in form and substance  satisfactory  to
the Trustee  stating that, in the opinion of counsel,  all such  conditions have
been complied  with and (c) where  applicable,  a  certificate  or opinion by an
independent  certified  public  accountant  satisfactory  to  the  Trustee  that
complies with TIA Section 314(c).

     SECTION 11.5  Statements Required in Certificate and Opinion of Counsel.
                   ---------------------------------------------------------

     Each  certificate  and Opinion of Counsel with respect to compliance with a
condition or covenant provided for in this Indenture shall include:

               (a) a  statement  that the  Person  making  such  certificate  or
          Opinion of Counsel has read such covenant or condition;
<PAGE>

               (b)  a  brief  statement  as to  the  nature  and  scope  of  the
          examination or  investigation  upon which the statements  contained in
          such certificate or Opinion of Counsel are based;

               (c) a statement that, in the opinion of such Person,  he has made
          such  examination  or  investigation  as is necessary to enable him to
          express an  informed  opinion as to  whether or not such  covenant  or
          condition has been complied with; and

               (d) a  statement  as to  whether or not,  in the  opinion of such
          Person, such condition or covenant has been complied with.

     SECTION 11.6  Rules by Trustee, Paying Agent, Registrar.
                   -----------------------------------------

     The Trustee may make  reasonable  rules in  accordance  with the  Trustee's
customary practices for action by or at a meeting of Securityholders. The Paying
Agent or Registrar may make reasonable rules for its functions.

     SECTION 11.7  Legal Holidays.
                   --------------

     If a payment date is a Legal Holiday at a place of payment,  payment may be
made at that place on the next  succeeding day that is not a Legal Holiday,  and
no interest shall accrue for the intervening period.

     SECTION 11.8  Governing Law.
                   -------------

     The internal laws of the State of New York shall govern this  Indenture and
the Securities without regard to principles of conflict of laws.

     SECTION 11.9  No Recourse Against Others.
                   --------------------------

     A trustee,  director,  officer,  employee,  stockholder or beneficiary,  as
such,  of the Company or the  Guarantors  shall not have any  liability  for any
obligations  of  the  Company  or  the  Guarantors  under  the  Securities,  the
Guarantees  or the  Indenture  or for any claim  based on, in  respect  of or by
reason of such obligations or their creation. Each Securityholder by accepting a
Security waives and releases all such liability.
<PAGE>

     SECTION 11.10  Successors.
                    ----------

     All  agreements of the Company and each Guarantor in this Indenture and the
Securities shall bind their respective successors. All agreements of the Trustee
in this Indenture shall bind its successor.

     SECTION 11.11  Duplicate Originals.
                    -------------------

     The  parties may sign any number of copies of this  Indenture.  Each signed
copy  shall  be an  original,  but  all of  them  together  represent  the  same
agreement.

     SECTION 11.12  Separability.
                    ------------

     In case any  provision  in this  Indenture  or in the  Securities  shall be
invalid, illegal or unenforceable,  the validity, legality and enforceability of
the remaining  provisions shall not in any way be affected or impaired  thereby,
and a Holder shall have no claim therefor against any party hereto.

     SECTION 11.13  Table of Contents, Headings, Etc.
                    ---------------------------------

     The table of contents,  cross-reference  sheet and headings of the Articles
and Sections of this Indenture  have been inserted for  convenience of reference
only, and are not to be considered a part hereof,  and shall in no way modify or
restrict any of the terms or provisions hereof.



<PAGE>

     IN WITNESS  WHEREOF,  the parties  hereto have caused this  Indenture to be
duly executed as of the date first written above.


                                      RENCO METALS, INC.


                                      By:  ----------------------------
                                           Name:
                                           Title:


                                      FLEET NATIONAL BANK, as Trustee


                                      By:  ----------------------------
                                           Name:
                                           Title:


                                      GUARANTORS:


                                      MAGNESIUM CORPORATION OF AMERICA


                                      By:  ----------------------------
                                           Name:
                                           Title:


                                      SABEL INDUSTRIES, INC.


                                      By:  ----------------------------
                                           Name:
                                           Title:







<PAGE>

                                                                       Exhibit A
                                                                       ---------


                           (Form of Face of Security)
                           --------------------------


                               RENCO METALS, INC.


No.                                                           $


                          11-1/2% SENIOR NOTE DUE 2003

     RENCO METALS,  INC. promises to pay to               or registered  assigns
the principal sum of                  Dollars on July 1, 2003.

Interest Payment Dates: January 1 and July 1

Record Dates: December 15 and June 15

                                           RENCO METALS, INC.


                                           By:__________________________________


                                           By:__________________________________

Dated:  _________________

Certificate of Authentication

     This  is one of the  11-1/2%  Senior  Notes  due  2003  referred  to in the
within-mentioned Indenture.


                                            FLEET NATIONAL BANK, as Trustee


                                            By:________________________________
                                                    Authorized Officer



<PAGE>



                              (REVERSE OF SECURITY)

                               RENCO METALS, INC.

                          11-1/2% SENIOR NOTE DUE 2003


     1. Interest.  RENCO METALS,  INC., a Delaware  corporation (the "Company"),
promises  to pay,  until  the  principal  hereof is paid or made  available  for
payment,  interest on the principal  amount set forth on the reverse side hereof
at a rate of 11-1/2% per annum.  Interest on this  11-1/2%  Senior Note due 2003
(the  "Security")  will accrue from and  including the most recent date to which
interest has been paid or, if no interest has been paid, from and including July
3, 1996 through but excluding the date on which interest is paid. Interest shall
be payable in arrears on January 1, July 1 and at the stated maturity commencing
January 1, 1997.  Interest  will be computed  on the basis of a 360-day  year of
twelve 30-day months. The Company shall pay interest on overdue principal and on
overdue  interest (to the full extent permitted by law) at a rate of 13-1/2% per
annum.

     2.  Method of  Payment.  The Company  will pay  interest on the  Securities
(except  defaulted  interest)  to the  Persons  who are  registered  Holders  of
Securities  at the close of business  on December 15 and June 15 next  preceding
the interest payment date.  Holders must surrender  Securities to a Paying Agent
to collect  principal  payments.  The Company will pay principal and interest in
money of the  United  States  that at the time of  payment  is legal  tender for
payment of public and private debts. If the Security is a Global  Security,  all
payments  in  respect of this  Security  will be made to the  Depository  or its
nominee in immediately  available funds in accordance with customary  procedures
established from time to time by the Depository.

     3.  Paying  Agent  and  Registrar.  Initially,  Fleet  National  Bank  (the
"Trustee")  will act as Paying Agent and  Registrar.  The Company may change any
Paying Agent or Registrar without notice. None of the Company,  any Guarantor or
any of their Affiliates may act as Paying Agent, Registrar or co-Registrar.

     4. Indenture. The Company issued the Securities under an Indenture dated as
of July 1, 1996 (the "Indenture"),  among the Company,  Magnesium Corporation of
America and Sabel Industries,  Inc. (the  "Guarantors"),  and the Trustee.  This
Security  is one of an issue  of  Securities  of the  Company  issued,  or to be
issued, under the Indenture. The terms of the Securities include those stated in
the  Indenture  and those made part of the  Indenture  by reference to the Trust
Indenture Act of 1939 (15 U.S. Code Sections 77aaa-77bbbb), as amended from time
to time. The Securities are subject to all such terms,  and Holders are referred
to the Indenture and such Act for a statement of them.  Capitalized  and certain
other terms used herein and not otherwise defined have the meanings set forth in
the Indenture.  The Securities are general unsecured  obligations of the Company
limited in aggregate  principal  amount to $150,000,000.  The Indenture  limits,
among  other  things,  the  incurrence  of  Indebtedness  by the Company and its
Subsidiaries;  the  creation of Liens by the Company and its  Subsidiaries;  the
declaration  or payment of any  dividend  or any other  distribution  on Capital
Stock of the  Company  or any  Subsidiary;  purchases,  redemptions,  and  other
acquisitions   or   retirements   of  Capital  Stock  of  the  Company  and  its
Subsidiaries;  transactions  by the  Company  and its  Subsidiaries  with  their
respective  Affiliates;  the  issuance  of  preferred  stock  by  the  Company's
Subsidiaries; and the ability of the Company or any of its Subsidiaries to merge
with or into another  entity.  The Indenture  also  requires  each  Guarantor to
comply with each of the covenants that impose  restrictions  on such  Guarantor.
The  limitations  are  subject  to a  number  of  important  qualifications  and
exceptions.  The Company must report to the Trustee quarterly on compliance with
the limitations contained in the Indenture.
<PAGE>

     5. Optional  Redemption.  The Securities will be subject to redemption,  in
whole or in part, at the option of the Company,  at any time on or after July 1,
2000, at the redemption  prices  (expressed as percentages of principal  amount)
set forth below plus accrued interest to the redemption date, if redeemed during
the 12-month period beginning on July 1 of the years indicated below:

                   Year                               Percentage
                   ----                               ----------

                   2000.........................      105.750%
                   2001.........................      102.875%
                   2002.........................      100.000%

     In addition,  at any time prior to July 1, 1999,  the Company may redeem up
to 33% of the aggregate  principal  amount of the Securities  originally  issued
with the proceeds of one or more Public Equity Offerings (as defined below) at a
redemption price (expressed as a percentage of principal  amount) of 110.5% plus
accrued interest to the redemption  date;  provided that at least $100.0 million
aggregate principal amount of Securities remains  outstanding  immediately after
any such  redemption.  In order to  effect  the  foregoing  redemption  with the
proceeds of any Public Equity  Offering,  the Company shall make such redemption
not  more  than 120 days  after  the  consummation  of any  such  Public  Equity
Offering.  "Public Equity  Offering"  means an  underwritten  public offering of
Capital  Stock  (other  than  Disqualified  Stock)  pursuant  to a  registration
statement filed with the SEC in accordance with the Securities Act.

     6. Notice of  Redemption.  Notice of redemption  will be mailed at least 30
days but not more than 60 days  before  the  redemption  date to each  Holder of
Securities to be redeemed at his registered address. On and after the Redemption
Date,  unless the Company  defaults in making the redemption  payment,  interest
ceases to accrue on Securities or portions thereof called for redemption.

     7. Offers To Purchase. Sections 4.13 and 4.15 of the Indenture provide that
after an Asset Sale or upon the  occurrence of a Change of Control,  and subject
to further  limitations  contained  therein,  the Company shall make an offer to
purchase  certain  amounts of Securities in accordance  with the  procedures set
forth in the Indenture.

     8. Denominations, Transfer, Exchange. The Securities are in registered form
without coupons in denominations  of $1,000 and integral  multiples of $1,000. A
Holder may transfer or exchange Securities in accordance with the Indenture. The
Registrar  may require a Holder,  among  other  things,  to furnish  appropriate
endorsements and transfer documents and to pay to it any taxes and fees required
by law or  permitted  by the  Indenture.  The  Registrar  need not  transfer  or
exchange any  Securities or portion of a Security  selected for  redemption,  or
transfer or exchange any  Securities  for a period of 15 days before a selection
of Securities to be redeemed.
<PAGE>

     9.  Persons  Deemed  Owners.  The  registered  Holder of a Security  may be
treated as the owner of it for all purposes.

     With respect to Global  Securities,  the  Depository  may grant proxies and
otherwise  authorize  Holders  of  Book-Entry  Securities  to give  or take  any
request,  demand,  authorization,  direction,  notice,  consent, waiver or other
action  which a Holder of a  Security  is  entitled  to give or take  under this
Indenture.

     10.  Unclaimed  Money.  If money for the payment of  principal  or interest
remains  unclaimed for two years, the Trustee or Paying Agent will pay the money
back to the Company at its written request.  After that, Holders entitled to the
money  must look to the  Company  for  payment as  general  creditors  unless an
"abandoned property" law designates another Person.

     11. Amendment,  Supplement,  Waiver. The Company and the Guarantors and the
Trustee may,  without the consent of the Holders of any outstanding  Securities,
amend, waive or supplement the Indenture or the Securities for certain specified
purposes,  including,  among  other  things,  curing  ambiguities,   defects  or
inconsistencies,  maintaining the qualification of the Indenture under the Trust
Indenture  Act of 1939,  as amended,  making any change that does not  adversely
affect the rights of any  Holder.  Other  amendments  and  modifications  of the
Indenture or the Securities  may be made by the Company,  the Guarantors and the
Trustee  with the  consent of the  Holders  of not less than a  majority  of the
aggregate  principal  amount of the outstanding  Securities,  subject to certain
exceptions requiring the consent of the Holders of the particular  Securities to
be affected.

     12. Successor  Corporation.  When a successor  corporation  assumes all the
obligations  of its  predecessor  under the Securities and the Indenture and the
transaction  complies  with  the  terms  of  Article  V of  the  Indenture,  the
predecessor corporation will be released from those obligations.

     13.  Defaults  and  Remedies.  Events  of  Default  are  set  forth  in the
Indenture.  Subject  to certain  limitations  in the  Indenture,  if an Event of
Default  (other than an Event of Default  specified  in Section  6.1(a)(vii)  or
(viii) of the Indenture) occurs and is continuing,  then the Holders of not less
than 25% in aggregate  principal  amount of the outstanding  Securities may, and
the Trustee  upon the  request of the Holders of not less than 25% in  aggregate
principal amount of the outstanding  Securities shall,  declare the principal of
and interest on all of the Securities to be due and payable  immediately.  If an
Event of Default  specified in Section  6.1(a)(vii)  or (viii) of the  Indenture
occurs and is continuing, the principal of, and premium, if any, and interest on
all of the Securities shall ipso facto become and be immediately due and payable
without any  declaration  or other act on the part of the Trustee or any Holder.
Holders may not enforce the  Indenture or the  Securities  except as provided in
the Indenture.  The Trustee may require indemnity reasonably  satisfactory to it
before  it  enforces  the  Indenture  or  the  Securities.  Subject  to  certain
limitations,  Holders of a majority in  aggregate  principal  amount of the then
outstanding  Securities  may direct the Trustee in its  exercise of any trust or
power.  The Trustee may withhold from Holders notice of any  continuing  default
(except a default in payment of principal or  interest)  if it  determines  that
withholding  notice is in their  interests.  The Company  must furnish an annual
compliance certificate to the Trustee.
<PAGE>

     14. Trustee  Dealings with Company.  The Trustee,  in its individual or any
other capacity,  may make loans to, accept  deposits from, and perform  services
for the Company or its  Affiliates,  and may otherwise  deal with the Company or
its Affiliates, as if it were not Trustee.

     15.  No  Recourse  Against  Others.  A  director,   officer,   employee  or
stockholder,  as such,  of the  Company  or the  Guarantors  shall  not have any
liability  for any  obligations  of the  Company  or the  Guarantors  under  the
Securities, the Guarantee or the Indenture or for any claim based on, in respect
of,  or by  reason  of,  such  obligations  or their  creation.  Each  Holder by
accepting a Security  waives and  releases  all such  liability.  The waiver and
release are part of the consideration for the issue of the Securities.

     16. Discharge.  The Company's obligations pursuant to the Indenture will be
discharged, except for obligations pursuant to certain sections thereof, subject
to the terms of the  Indenture,  upon the payment of all the  Securities or upon
the irrevocable deposit with the Trustee of money or U.S. Government Obligations
sufficient to pay when due  principal  of, and premium,  if any, and interest on
the Securities to maturity or redemption, as the case may be.

     17.  Authentication.  This  Security  shall not be valid  until the Trustee
manually  signs the  certificate  of  authentication  on the other  side of this
Security.

     18.  Abbreviations.  Customary  abbreviations  may be used in the name of a
Holder or an  assignee,  such as:  TEN COM (=  tenants  in  common),  TEN ENT (=
tenants by the  entireties),  JT TEN (= joint tenants with right of survivorship
and not as tenants in common), CUST (= Custodian),  and U/G/M/A (= Uniform Gifts
to Minors Act).

     19. Certain Information Obligations.  Pursuant to the Indenture, whether or
not required by the rules and  regulations of the SEC, so long as any Securities
are  outstanding,  the Company will file with the SEC and distribute or cause to
be distributed to holders of the Securities copies of the financial  information
that would have been contained in such annual reports and quarterly reports that
the Company  would have been  required to file with the SEC  pursuant to Section
13(a) or 15(d) of the Exchange Act.  Such  financial  information  shall include
annual reports containing  consolidated  financial statements and notes thereto,
together with an opinion thereon  expressed by an independent  public accounting
firm, management's discussion and analysis of financial condition and results of
operations  as  well  as  quarterly  reports  containing   unaudited   condensed
consolidated  financial  statements  for the first three quarters of each fiscal
year.
<PAGE>

     The Company  will  furnish to any Holder upon  written  request and without
charge a copy of the Indenture. Requests may be made to:

                           Renco Metals, Inc.
                           c/o Magnesium Corporation of America
                           238 North 2200 West
                           Salt Lake City, Utah  84116
                           Attention:  Ira Leon Rennert, Chairman



<PAGE>



                                    GUARANTEE

     Each  Guarantor  (which  term  includes  any  successor  Person  under  the
Indenture)  has  unconditionally  guaranteed,  to the  extent  set  forth in the
Indenture  and  subject  to the  provisions  in the  Indenture,  (a) the due and
punctual payment of the principal of and interest on the Securities,  whether at
maturity, by acceleration or otherwise, the due and punctual payment of interest
on overdue principal, and, to the extent permitted by law, interest, and the due
and punctual  performance  of all other  obligations of the Company or the other
Guarantors  to the Holders or the Trustee all in  accordance  with the terms set
forth in Article X of the  Indenture and (b) in case of any extension of time of
payment or renewal of any Securities or any of such other obligations,  that the
same will be promptly paid in full when due or performed in accordance  with the
terms of the extension or renewal,  whether at stated maturity,  by acceleration
or otherwise.

     The  obligations  of the Guarantors to the Holders of Securities and to the
Trustee  pursuant to the  Guarantee and the Indenture are expressly set forth in
Article X of the Indenture and reference is hereby made to the Indenture for the
precise terms of the Guarantee.

                                           Guarantors:

                                           MAGNESIUM CORPORATION OF AMERICA



                                           By:----------------------------------
                                                    Chief Executive Officer



                                           By:----------------------------------
                                                        Secretary


                                           SABEL INDUSTRIES, INC.



                                           By:----------------------------------
                                                    Chief Executive Officer



                                           By:----------------------------------
                                                         Secretary



<PAGE>



                                 ASSIGNMENT FORM

If you the Holder want to assign this Security,  fill in the form below and have
your signature guaranteed:

I or we assign and transfer this Security to

- --------------------------------------------------------------------------------

(Insert assignee's social security or tax ID number)----------------------------

- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------

 (Print or type assignee's name, address and zip code) and irrevocably appoint

- --------------------------------------------------------------------------------

agent to transfer  this Security  on  the books of  the Company.  The agent  may
substitute another to act for him.

- --------------------------------------------------------------------------------

Date:-------                 Your signature:--------------------------
                                           (Sign exactly as your name appears on
                                            the other side of this Security)


Signature Guarantee:------------------------------------------------------------



<PAGE>



                       OPTION OF HOLDER TO ELECT PURCHASE

     If you wish to have this  Security  purchased  by the  Company  pursuant to
Section 4.13 or 4.15 of the Indenture, check the Box:    4.13 [   ] 4.15 [   ]

     If you wish to have a portion of this  Security  purchased  by the  Company
pursuant to Section 4.13 or 4.15 of the Indenture, state the amount:

                                                 $---------------


Date:---------------        Your signature:-------------------------------------
                                           (Sign exactly as your name appears on
                                            the other side of this Security)

Signature Guarantee:--------------------------------


<PAGE>
                                                                       EXHIBIT B
                                                                       ---------

                    FORM OF LEGEND FOR BOOK-ENTRY SECURITIES

     Any Global  Security  authenticated  and delivered  hereunder  shall bear a
legend in substantially the following form:

               THIS SECURITY IS A GLOBAL  SECURITY  WITHIN THE MEANING
          OF THE INDENTURE  HEREINAFTER  REFERRED TO AND IS REGISTERED
          IN THE NAME OF A DEPOSITORY  OR A NOMINEE OF A DEPOSITORY OR
          A SUCCESSOR  DEPOSITORY.  THIS SECURITY IS NOT  EXCHANGEABLE
          FOR SECURITIES REGISTERED IN THE NAME OF A PERSON OTHER THAN
          THE   DEPOSITORY  OR  ITS  NOMINEE  EXCEPT  IN  THE  LIMITED
          CIRCUMSTANCES DESCRIBED IN THE INDENTURE, AND NO TRANSFER OF
          THIS  SECURITY  (OTHER THAN A TRANSFER OF THIS SECURITY AS A
          WHOLE BY THE DEPOSITORY TO A NOMINEE OF THE DEPOSITORY OR BY
          A NOMINEE OF THE  DEPOSITORY  TO THE  DEPOSITORY  OR ANOTHER
          NOMINEE OF THE DEPOSITORY)  MAY BE REGISTERED  EXCEPT IN THE
          LIMITED CIRCUMSTANCES DESCRIBED IN THE INDENTURE.

               UNLESS THIS  CERTIFICATE  IS PRESENTED BY AN AUTHORIZED
          REPRESENTATIVE  OF THE DEPOSITORY TRUST COMPANY,  A NEW YORK
          CORPORATION ("DTC"), TO ISSUER OR ITS AGENT FOR REGISTRATION
          OF  TRANSFER,  EXCHANGE,  OR  PAYMENT,  AND ANY  CERTIFICATE
          ISSUED  IS  REGISTERED  IN THE NAME OF CEDE & CO. OR IN SUCH
          OTHER NAME AS IS REQUESTED BY AN  AUTHORIZED  REPRESENTATIVE
          OF DTC (AND  ANY  PAYMENT  IS MADE TO CEDE & CO.  OR TO SUCH
          OTHER ENTITY AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE
          OF DTC), ANY TRANSFER,  PLEDGE OR OTHER USE HEREOF FOR VALUE
          OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL INASMUCH AS THE
          REGISTERED OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.



<PAGE>

                              CROSS-REFERENCE TABLE

TIA Section                                                   Indenture Section
- -----------                                                   -----------------

Section 310(a)(1).....................................               7.10
           (a)(2).....................................               7.10
           (a)(3).....................................               N.A.
           (a)(4).....................................               N.A.
           (b)........................................    7.8; 7.10; 11.2
           (c)........................................               N.A.
Section 311(a)........................................               7.11
           (b)........................................               7.11
           (c)........................................               N.A.
Section 312(a)........................................                2.5
           (b)........................................               11.3
           (c)........................................               11.3
Section 313(a)........................................                7.6
           (b)(1).....................................                7.6
           (b)(2).....................................                7.6
           (c)........................................          7.6; 11.2
           (d)........................................                7.6
Section 314(a)........................................     4.7; 4.8; 11.2
           (b)........................................               N.A.
           (c)(1).....................................               11.4
           (c)(2).....................................               11.4
           (c)(3).....................................               N.A.
           (d)........................................               N.A.
           (e)........................................               11.5
           (f)........................................               N.A.
Section 315(a)........................................             7.1(b)
           (b)........................................          7.5; 11.2
           (c)........................................             7.1(a)
           (d)........................................             7.1(c)
           (e)........................................               6.11
Section 316(a) (last sentence)........................                2.9
           (a)(1)(A)..................................                6.5
           (a)(1)(B)..................................                6.4
           (a)(2).....................................               N.A.
           (b)........................................                6.7
- -------------------
N.A. means Not Applicable.

NOTE:  This Cross-Reference  Table shall not, for any purpose, be deemed to be a
       part of this Indenture.


<PAGE>



Section 317(a)(1)......................................                6.8
           (a)(2)......................................                6.9
           (b).........................................                2.4
Section 318(a)(1)......................................               11.1
- -------------------
N.A. means Not Applicable.

NOTE:  This Cross-Reference Table shall not, for any purpose, be deemed to be a 
       part of this Indenture.



<PAGE>


                           TABLE OF CONTENTS
                           -----------------

Section                                                                    Page
- -------                                                                    ----

                               ARTICLE I

              DEFINITIONS AND INCORPORATION BY REFERENCE

SECTION 1.1     Definitions..................................................2
SECTION 1.2     Incorporation by Reference of Trust Indenture Act............13
SECTION 1.3     Rules of Construction........................................13

                             ARTICLE II

                           THE SECURITIES

SECTION 2.1     Form and Dating..............................................14
SECTION 2.2     Execution and Authentication.................................14
SECTION 2.3     Registrar and Paying Agent...................................15
SECTION 2.4     Paying Agent To Hold Money in Trust..........................15
SECTION 2.5     Securityholder Lists.........................................15
SECTION 2.6     Transfer and Exchange........................................16
SECTION 2.7     Replacement Securities.......................................17
SECTION 2.8     Outstanding Securities.......................................17
SECTION 2.9     Treasury Securities..........................................18
SECTION 2.10    Temporary Securities.........................................18
SECTION 2.11    Cancellation.................................................18
SECTION 2.12    Defaulted Interest...........................................19
SECTION 2.13    CUSIP Number.................................................19
SECTION 2.14    Deposit of Moneys............................................19

                             ARTICLE III

                             REDEMPTION

SECTION 3.1     Optional Redemption..........................................19
SECTION 3.2     Notices to Trustee...........................................20
SECTION 3.3     Selection of Securities To Be Redeemed.......................20
SECTION 3.4     Notice of Redemption.........................................21
SECTION 3.5     Effect of Notice of Redemption...............................22
SECTION 3.6     Deposit of Redemption Price..................................22
SECTION 3.7     Securities Redeemed in Part..................................22
<PAGE>
Section                                                                    Page
- -------                                                                    ----


                             ARTICLE IV

                              COVENANTS

SECTION 4.1     Payment of Securities........................................22
SECTION 4.2     Maintenance of Office or Agency..............................23
SECTION 4.3     Corporate Existence..........................................23
SECTION 4.4     Payment of Taxes and Other Claims............................23
SECTION 4.5     Maintenance of Properties; Insurance; Books and Records;
                     Compliance with Law.....................................24
SECTION 4.6     Guarantees...................................................24
SECTION 4.7     Compliance Certificates......................................24
SECTION 4.8     Reports......................................................25
SECTION 4.9     Further Assurance to the Trustee.............................25
SECTION 4.10    Limitation on Additional Indebtedness........................26
SECTION 4.11    Limitation on Liens..........................................27
SECTION 4.12    Limitation on Restricted Payments............................28
SECTION 4.13    Limitation on Certain Sales of Assets and Subsidiary Stock...29
SECTION 4.14    Limitation on Transactions with Affiliates...................32
SECTION 4.15    Change of Control............................................32
SECTION 4.16    Limitation on Dividends and Other Payment
                     Restrictions Affecting Subsidiaries.....................34
SECTION 4.17    Limitation on Issuance of Preferred Stock by Subsidiaries....34
SECTION 4.18    Special Covenants of Each Guarantor..........................35
SECTION 4.19    Additional Guarantors........................................35
SECTION 4.20    Limitation on Investments, Loans and Advances................35
SECTION 4.21    Limitation on Sale-Leaseback Transactions....................35
SECTION 4.22    Waiver of Stay, Extension or Usury Laws......................36

                              ARTICLE V

                        SUCCESSOR CORPORATION

SECTION 5.1     When Company May Merge, Etc..................................36
SECTION 5.2     Successor Entity Substituted.................................37

                             ARTICLE VI

                        DEFAULT AND REMEDIES

SECTION 6.1     Events of Default............................................37
SECTION 6.2     Acceleration.................................................39
SECTION 6.3     Other Remedies...............................................39
SECTION 6.4     Waiver of Past Default.......................................40
SECTION 6.5     Control by Majority..........................................40
SECTION 6.6     Limitation on Suits..........................................40
SECTION 6.7     Rights of Holders To Receive Payment.........................41
SECTION 6.8     Collection Suit by Trustee...................................41
SECTION 6.9     Trustee May File Proofs of Claim.............................41
SECTION 6.10    Priorities...................................................42
SECTION 6.11    Undertaking for Costs........................................42
<PAGE>
Section                                                                    Page
- -------                                                                    ----


                             ARTICLE VII

                               TRUSTEE

SECTION 7.1     Duties of Trustee............................................42
SECTION 7.2     Rights of Trustee............................................44
SECTION 7.3     Individual Rights of Trustee.................................44
SECTION 7.4     Trustee's Disclaimer.........................................45
SECTION 7.5     Notice of Defaults...........................................45
SECTION 7.6     Reports by Trustee to Holders................................45
SECTION 7.7     Compensation and Indemnity...................................45
SECTION 7.8     Replacement of Trustee.......................................46
SECTION 7.9     Successor Trustee by Merger, Etc.............................47
SECTION 7.10    Eligibility; Disqualification................................47
SECTION 7.11    Preferential Collection of Claims Against Company............47

                            ARTICLE VIII

                 DISCHARGE OF INDENTURE; DEFEASANCE

SECTION 8.1     Termination of Company's Obligations.........................48
SECTION 8.2     Legal Defeasance and Covenant Defeasance.....................49
SECTION 8.3     Application of Trust Money...................................52
SECTION 8.4     Repayment to Company or Guarantors...........................52
SECTION 8.5     Reinstatement................................................53

                             ARTICLE IX

                 AMENDMENTS, SUPPLEMENTS AND WAIVERS

SECTION 9.1     Without Consent of Holders...................................53
SECTION 9.2     With Consent of Holders......................................54
SECTION 9.3     Compliance with Trust Indenture Act..........................55
SECTION 9.4     Revocation and Effect of Consents............................55
SECTION 9.5     Notation on or Exchange of Securities........................55
SECTION 9.6     Trustee To Sign Amendments, Etc..............................56

                              ARTICLE X

                       GUARANTEE ARRANGEMENTS

SECTION 10.1    Guarantee....................................................56
SECTION 10.2    Execution and Delivery of Guarantee..........................57
SECTION 10.3    Release of a Guarantor.......................................58
SECTION 10.4    Limitation of Guarantee......................................58

                             ARTICLE XI

                            MISCELLANEOUS

SECTION 11.1    Trust Indenture Act Controls.................................58
SECTION 11.2    Notices......................................................58
SECTION 11.3    Communications by Holders with Other Holders.................59
SECTION 11.4    Certificate and Opinion of Counsel as to
                    Conditions Precedent.....................................59
SECTION 11.5    Statements Required in Certificate and Opinion of Counsel....59
SECTION 11.6    Rules by Trustee, Paying Agent, Registrar....................60
SECTION 11.7    Legal Holidays...............................................60
SECTION 11.8    Governing Law................................................60
SECTION 11.9    No Recourse Against Others...................................60
SECTION 11.10   Successors...................................................61
SECTION 11.11   Duplicate originals..........................................61
SECTION 11.12   Separability.................................................61
SECTION 11.13   Table of Contents, Headings, Etc.............................61

SIGNATURES...................................................................62

EXHIBIT A - Form of Security...............................................A-1
EXHIBIT B - Form of Legend for Book-Entry Securities.......................B-1




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