May 19, 1999



  Congress Financial Corporation (Southwest)
  1201 Main Street, Suite 1625
  Dallas, Texas 75250

  Ladies and Gentlemen:

       Reference is made to the financing agreements (the
  "Financing Documents") between L&S Bearing Co., LSB Extrusion
  Co., Tribonetics Corporation, Rotex Corporation, L&S
  Automotive Products Co., and International Bearings, Inc.
  (collectively, "Borrower") and Bank of American National Trust
  and Savings Association, successor-in-interest to BankAmerica
  Business Credit, Inc. ("Lender").  We understand that, on the
  Payoff Date (as hereinafter defined), Borrower expects to
  obtain financing (the "Financing") from Congress Financial
  Corporation (Southwest) ("Congress") for the purpose of
  repaying in full all of the obligations and liabilities of
  Borrower to Lender under or in respect of the Financing
  Documents (the "Lender Obligations").

       1.   This letter will confirm that, upon receipt by
  Lender of:

            (a)  no later than 12:00 p.m., Pacific time on
  May 10, 1999, a wire transfer of immediately available funds
  to Lender in the aggregate amount of $11,834,739.33, subject
  to adjustment as set forth in this paragraph 1 (as so adjusted
  the "Payout Amount"), consisting of:

                 (i)  $11,723,071.78 in respect of unpaid
  principal outstanding under the Financing Documents (assuming
  no further loans or repayments are made); and

                 (ii) $109,136.29 in respect of accrued and
  unpaid interest on such unpaid principal amount, assuming no
  changes in applicable interest rates and no changes in the
  outstanding principal amount (the per diem accrual of such
  interest being $2,464.42 per day);

                 (iii)     $2,531.26 representing expenses of
  Lender payable by Borrower pursuant to the Financing Documents
  consisting of (A) $0 in respect of letter of credit
  obligations outstanding, (B) $63.39 in respect of letter
  credit fees and expenses, and (C) $2,467.87 in respect of
  unused line fees.



            (b)  a fully executed counterpart of this letter
  agreement signed by Borrower.

  (the date on which all of the foregoing conditions shall first
  be satisfied herein called the "Payoff Date"), all of the
  Lender Obligations shall be terminated and satisfied in full.
  If the assumptions set forth above with respect to the
  calculation of the principal and interest components of the
  Payout Amount are not correct, we will so advise Borrower and
  Congress and notify each of them writing on or before the
  Payoff Date of the adjusted figure for the Payout Amount,
  reflecting the appropriate changes in the amounts of principal
  and interest.  Upon receipt of the Payout Amount in accordance
  with the foregoing and satisfaction of the other conditions
  referred to above, Lender agrees to release, on and with
  effect from the Payoff Date, all of its security interests,
  liens and other documents created as security for the Lender
  Obligations.

       2.   Please transfer the Payout Amount to Bank of
  America, San Francisco, California, ABA No. 121000358, Account
  No. 12575-03561 (reference LSB Industries), by wire transfer
  of immediately available funds, for receipt no later than
  12:00 p.m., Pacific time, on the Payoff Date.

       3.   Borrower hereby confirms that the commitments of
  Lender to make loans to Borrower under the Financing Documents
  are terminated as of the Payoff Date.

       4.   Lender will, concurrently with the satisfaction of
  the conditions referred to in Paragraph 1 above, execute and
  deliver any Uniform Commercial Code termination statements,
  lien releases, mortgage releases, re-assignments of
  trademarks, discharges of security interests, and other
  similar discharge or release documents (and if applicable, in
  recordable form) as are reasonably necessary to release, as of
  record, the security interests, financing statements, and all
  other notices of security interests and liens previously filed
  by Lender with respect to the Lender Obligations.

  5.   Lender will, as promptly as practicable upon the
  satisfaction of the conditions referred to in Paragraph 1
  above, return to Borrower the originals of any and all
  promissory notes and other documents evidencing or securing
  Borrowers' obligations to Lender previously delivered to
  Lender in connection with the Financing Documents, duly marked
  "paid in full" or "cancelled" (or with written authorizations
  to so mark such documents after the Payoff Date actually
  occurs) as may be appropriate.

       6.   Lender shall execute and deliver to or for Borrower
  or Congress such additional documents and shall provide
  additional information as Borrower or Congress may reasonably
  require to carry out the terms of this letter agreement.

       7.   Borrower acknowledges that the amounts referred to
  in Paragraph 1 above are enforceable obligations of it owed to
  Lender pursuant to the provisions of the Financing Documents
  and confirms its agreement to the terms and provisions of this
  letter by returning to Lender a signed counterpart of this


  letter.  This letter may be executed by each party on a
  separate counterpart, each of which when so executed and
  delivered shall be an original, but all of which together
  shall constitute one agreement.

  Very truly yours,

  BANK OF AMERICA NATIONAL TRUST AND
  SAVINGS ASSOCIATION, successor-in-trust to
  BankAmerica Business Credit, Inc.



  By:   __________________________________

  Title: _________________________________


  Agreed to by the undersigned:

  L&S BEARING CO.



  By:   __________________________________

  Title: _________________________________


  LSB EXTRUSION CO.



  By:   __________________________________

  Title: _________________________________


  TRIBONETICS CORPORATION



  By:   __________________________________

  Title: _________________________________



  ROTEX CORPORATION



  By:   __________________________________

  Title: _________________________________


  L&S AUTOMOTIVE PRODUCTS CO.



  By:   __________________________________

  Title: _________________________________


  INTERNATIONAL BEARINGS, INC.



  By:   __________________________________

  Title: _________________________________