Snap-On STSM10A is a 1/2" drive metric standard triple-square bit socket driver for 10 mm fasteners. It uses a 10 mm triple-square bit designed to engage the distinctive XZN-style fasteners found on automotive and industrial components. Sized for the 1/2" drive system, STSM10A is meant to work with compatible ratchets and sockets to deliver reliable torque transfer when installing or removing 10 mm triple-square bolts. As part of Snap-On’s line of dedicated hand tools, this driver provides a focused solution for technicians dealing with metric triple-square fasteners in automotive maintenance and repair tasks.
