. The triple square tip geometry is machined to precise tolerances for an exact fit with fasteners.3/8 Inch Drive x M7 Triple Square Bit Socket Die-stamped markings are permanently impressed into the steel and cant wear off.
Each socket size meets a minimum of 1.3/8 Inch Drive x 15 mm Deep 12-Point Impact Socket They're designed for use with both friction ring anvils and detent pin anvils.3 times the ANSI/ASME standard for proof torque..