Screwdriver S/D Square Bit

The Square Screwdriver Bits are made of S2 alloy steel, with heat treatment and featuring high hardness, they are not easy to wear. These magnetic bits can be firmly fixed on screwdrivers and keep screws stuck to them to improve your work efficiency. They have a 1/4 inch (6.35mm) hex shank, and are fit for electric screwdrivers, hand screwdrivers, electric drills, air drills, etc.