Electric Screw Driver Bit Set in Pakistan BR1522 Features 100% High quality and Brand new. Suitable for cordless drills and other electric screwdrivers. High alloy steel S2, the overall induction hardening, wear. Product hardness HRC58-60 degrees Professional, fast , convenient, powerful, tough and precision. Specification: Material: S2 Steel Hex Shank Size: 1/4" (6.35mm) Total Length: 65mm Packages Include: 1 Set of 10 Pieces Magnetic Dual Ended Screwdriver Bit.