Proto® J4770-4M Metric Standard Length Socket Bit, 4 mm Bit, 1/4 in Square Drive, 1 in Bit Length
Proto® Socket Bit, Standard Length, Measurement System Metric, 1/4 in Drive, Square Drive, 4 mm Bit, Hex Bit, 1 in Bit Length, 1-7/8 in Overall Length, 6 Points, Forged Alloy Steel, Full Polished Chrome
- Bit holders have a hex opening to hold the bit allowing the bit holder to take the full load of torque
- Two-piece design allows replacement of worn bits