Made from high-grade S2 steel with a torsion zone, our impact bits are designed to withstand high-torque impact drivers, ensuring exceptional durability and avoiding breakage even under heavy use CNC precision machined tip brings less cam-out, more accurate locking of screws, and the strengthened magnetic tips easy pick up of screws, preventing slipping, improving convenience and efficiency Strong magnetic phillips bit tips maintain magnetism over repeated use for precision work or picking up screws in long, narrow and complex spaces. 1/4 quick change hex shank gives them high adaptability With 20pcs of 1" PH2 impact phillips bits, this set is a perfect choice to replace worn-out bits and keep your tools in top shape. Manganese phosphate surface gives them better rust and corrosion protection Comes with a plastic storage box with belt clip and hook for easy portability and organization, help you easily pick up screws and protect bits from damage These impact PH2 Phillips bits are compatible with impact drivers, regular drills, electric screwdrivers, power drills and more. Perfect for mechanical, automobiles, motorcycles, and home repairs WORKPRO 20pcs PH2 Impact Phillips Screwdriver Bit Set, CNC Machined S2 Steel Tips with Magnetism, 1/4" Hex-Shank Driver Bits, 1" Long Impact Screwdriving Bits with Storage Box