ITEM NAME:10 Pcs Hex Head Allen Wrench Drill Bit Set Magnetic Shank Quick Release Tip R3D4 description: 100% new high quality Hex Head Screwdriver Bits are made of S2 alloy steel which is a commonly used material in hardware with high hardness. Magnetic bits are firmly fixed on screwdrivers. Color as shown 1. Material: High Quality S2 Steel Material in a Beautiful Black Finish 2. Specifications: 5/64 (1.98mm), 3/32 (2.38mm), 7/64 (2.78mm), 1/8 (3.17mm), 9/64 (3.5mm), 5/32 (3.97mm) ), 3/16 (4.76mm), 7/32 (5.56mm), 1/4 (6.35mm), 5/16 (7.94mm); Uses:Suitable for electric screwdrivers, hand screwdrivers, electric drills, air drills and so forth. Packing: 10 x Screwdriver Bit.Hex Head Screwdriver Bits are made of S2 alloy steel which is a commonly used material in hardware with high hardness. Magnetic bits are firmly fixed on screwdrivers. Material: High Quality S2 Steel Material in a Beautiful Black Finish.