3/8 Inch Drive x 21 mm 6-Point Impact Socket, Tekton, Mfr#: SID12121

TEKTON impact sockets have both a high-visibility laser marking and a permanent stamped marking that won’t wear off. They’re designed for use with both friction ring anvils and detent pin anvils. Precise 6-point openings provide an exact fit for hex fasteners. Each socket size meets a minimum of 1.3 times the ANSI/ASME standard for proof torque.