Triple Square Bit Socket TEKTON 3/8-in Drive M10 Triple Square Bit Driver Socket In The Driver Impact Bit Socket A detent pin hole on one side of the drive end also supports engagement with detent pin anvil styles. The triple square (also called XZN) bits are made from S2 heat-treated steel. The tip is machined to precise tolerances for an exact fit... Precise Triple Square Geometry – The triple square (also called XZN) tip is machined to precise tolerances Détecteur De Présence Ir Pour Extérieur - Avidsen Two Size Markings – The size is marked with a high-visibility laser marking and a permanent stamped marking that won't rub off Permanent Connection – The bit is pressed directly into the socket for a permanent connection that won't loosen over time or under stress Tekton, 1/2in. Drive x M10 Triple Square Impact Bit Socket, Model# SIB28210 | Northern Tool Tekton's two-piece design allows us to optimize the steel alloys, heat treatments, and forming processes for the bit and socket separately, resulting in a tool that's higher performing and more durable than traditional one-piece impact bit sockets. The bits are made from S2 steel that's heat-treated to a higher hardness (58–62 HRC) to help maintain their geometry under stress. The two pieces are permanently press-fit together and won't loosen over time.