EXHIBIT 99.3




                            CERTIFICATION PURSUANT TO
                             18 U.S.C. SECTION 1350,
                             AS ADOPTED PURSUANT TO
                  SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002



In connection with the Annual Report of CompX  International  Inc. (the Company)
on Form 10-K for the year ending  December 31, 2002 as filed with the Securities
and Exchange  Commission on the date hereof (the Report),  I, Darryl R. Halbert,
Vice President and Controller (Chief Financial Officer) of the Company, certify,
pursuant  to  18  U.S.C.   ss.1350,   as  adopted  pursuant  to  ss.906  of  the
Sarbanes-Oxley Act of 2002, that:

(1)  The Report fully complies with the  requirements  of Section 13(a) or 15(d)
     of the Securities Exchange Act of 1934; and

(2)  The information  contained in the Report fairly  presents,  in all material
     respects, the financial condition and result of operations of the Company.


/s/  Darryl R. Halbert
- ----------------------------------
Darryl R. Halbert
Vice President, Chief Financial Officer and Controller
March 14, 2003