<PAGE>


                                 PROMISSORY NOTE

$50,000.00                                                    September 26, 2000

         FOR VALUE RECEIVED, the undersigned, Mixson Corp., a Florida
corporation, with offices at 7635 West 28th Avenue, Hialeah, FL 33016 (the
"Maker"), promises to pay to Steve Bedowitz ("Payee") the principal sum of Fifty
Thousand Dollars ($50,000.00), together with interest thereon at the rate of ten
percent (10%) per annum computed on the balance of principal remaining from time
to time unpaid from the date of disbursement, as follows:

Interest on the outstanding principal balance shall begin to accrue beginning on
the date the loan is funded. Payments under this Note shall be made to the Payee
as follows:

All accrued interest and principal shall be paid in full within three (3) days
after the closing of the anticipated public offering ("Offering") for the merged
Speed Release Lock Company, Mixson Corp., and PPCT Products, L.L.C. entity
("Merged Entity"), provided that the Offering raises a minimum of two Million
Five Hundred Thousand Dollars ($2,500,000.00). In the event that the Offering
does not raise at least Two Million Five Hundred Thousand Dollars
($2,500,000.00) on or before May 31, 2001, this promissory note shall be
converted to either: (a) 1.5% of the common stock in the Merged Entity, if
applicable; or (b) 1.667% of the common stock of Mixson Corp. and 1.667% of the
membership interests in PPCT Products, L.L.C., in the event the merger forming
the Merged Entity does not occur for any reason.

If the payment of the outstanding principal balance, together with any accrued
and unpaid interest thereon, is not made or converted when provided for herein,
then Maker shall be in default and such total past due amount shall thereafter,
until paid, accrue and bear interest at the default interest rate of the highest
rate then permitted by applicable law. Further, Payee may pursue any and all
other remedies available at law or in equity, including pursuing collection
against any guarantor.

Any provision contained in this Note to the contrary notwithstanding, Payee
shall not be entitled to receive or collect, nor shall Maker be obligated to
pay, interest on any of the indebtedness evidenced hereby in excess of the
maximum rate of interest permitted by applicable law, and if any provision of
this Note shall ever be construed or held to permit the collection or to require
the payment of any amount of interest in excess of that permitted by applicable
law, the provisions of this paragraph shall control and shall override any
contrary or inconsistent provision herein. It is the intention of the parties to
conform strictly to applicable usury laws, and to the extent the terms of this
Note or any other such document are determined to be inconsistent with such
usury laws, this Note shall be subject to reduction to the maximum rate of
interest allowed under applicable usury laws.

Payee shall be entitled to collect all costs of enforcement including attorneys'
fees if Maker is in default.

This Note is expressly made subordinate to the rights, liens, and security
interests of any commercial lender(s), as they may exist from time to time,
which lender(s) may be granted a lien

<PAGE>


on Maker's inventory, accounts receivable and/or other assets. Any Payee
shall, if necessary, execute any reasonable documentation acknowledging its
subordinated position to any such commercial lender that may do business with
Maker from time to time. Should any Payee fail to sign any such
acknowledgment, Payee hereby appoints any officer of Maker to execute such
acknowledgment on Payee's behalf as its attorney in fact. This Note is
secured solely by any guarantees received by Payee. None of Maker's assets
are pledged as security for repayment of this Note.

This Note shall be governed and construed under the laws of the State of
Florida, and in the event Payee files suit to enforce its rights under this
Note, Maker hereby consents to jurisdiction and venue in Florida.

Maker waives presentment for payment, protest and demand, and notice of protest,
demand and dishonor.

The sums due under this Note shall not be subject to offset, deduction or claims
which Maker or any guarantor may have against each other or the Payee or holder
hereof, each Maker and guarantor hereby waives any such claim of offset,
deduction or any claim in the nature thereof.

All notices (except as expressly provided herein to the contrary) and payments
required or permitted hereunder shall be in writing and shall be either
personally served or sent by registered or certified mail, return receipt
requested, postage prepaid, as follows:

If to Payee:  Steve Bedowitz                 If to Maker:  Mixson Corp.
              c/o Joel Held                                7635 West 28th Avenue
              Arter & Hadden LLP                           Hialeah, FL 33016
              1717 Main Street, Suite 4100
              Dallas, Texas 75201

All notices given in accordance with this paragraph shall be effective and
deemed received upon receipt by the addressee.

                                       MAKER:

                                       Mixson Corp.


                                       By:  /s/ Joseph A. Rotmil
                                          ------------------------------------
                                            Joseph A. Rotmil, President



                                       2