Part of the stanley tools transmodule system a modular mechanics storage system ideal for the workshop designed to use with compatible transmodule system storage cabinets all the sockets feature maxi drive that helps reduce fastener rounding and are made from chrome vanadium steel the bit sockets are made from s2 steel hrc 60 2 with a 20 higher torque than cr v the extensions are also made from chrome vanadium steel with a full polished finish the ratchet features a socket safety lock and a rev