These No.2 PZ-type impact screwdriver bits are made from S2 steel, which is correctly hardened and tempered for durability and long life. Each has a blackened 1/4" hex shank with a shot blast finish and precision ground tips to prevent cam out and screw damage. The shock absorbing torsion design increases torque performance. There are highly visible laser-etched size markings on the hex shank. Specifically designed for use with an impact driver. https://elecena.pl/product/27395405/draper-expert-05647-pz-type-impact-s-driver-bits-no2x50mm-1-4-quot-hex-5pc 2024-12-05 https://elecena.pl/product/27395405/draper-expert-05647-pz-type-impact-s-driver-bits-no2x50mm-1-4-quot-hex-5pc 2026-07-14