The MMTC TSD-1 Tamperproof Screw Bit is a service and installation tool designed for use with compatible MMTC tamper-resistant control stations and key switch assemblies. MMTC offers versions for both surface-mounted and flush-mounted units, helping technicians properly install or remove tamperproof hardware during maintenance or replacement work.
The TSD-1/SURFACE version is compatible with select MMTC surface-mounted models including 1BX, 2BX, 3BX, 2BXL, 3BXL, PBT-3, PBTL-3, 3BLM, 1KX, 1KXS, 1KXL, and 1KXL-O. The TSD-1/FLUSH version is designed for compatible flush-mounted units including 1KF, 1KFX, 1KFS, 1KFSX, HBF, HBFX, HBFS, HBFSX, HBFT, and HBFST. Public manufacturer listings do not provide dimensions or material specifications.

