AM-4MM Metric Power Bit, 1/4'' Socket Head Hex Drive, 4mm

The AM-4MM Metric Power Bit is made of a proprietary S2 steel and heat treated for increased durability, greater strength and longer life. It has tighter tolerances, superior consistency and a better fit to fasteners leading to better torque transfer. The power bit is best used with Quick-Release (QR series) chucks. Point hex size: 4mm. Overall length: 1-15/16" (49mm).