About This Screwdriver Bit Set: 1 inches (T7,T8,T9,T10,T15,T20,T25,T27,T30,T40,Security Torx Head TT7,TT8,TT9,TT10,TT15,TT20,TT25,TT27,TT30,TT40)),2 inches (T25x1) bits and 1 Pieces 2.5 inches impact bit holder,they're all have a customized Organizer Sleeve Impact Hollow Star Bits: Impact Shock Absorbent Zone stands up to impact drivers. It can be handled a new generation of higher torque impact drivers S2 Alloy Steel: it owns the features of high hardness and good toughness and resistance through strictly heat treatment, durable and suitable for any industrial use Precision Tips Head: deliver a better fit and less cam-out, each edge can accurately lock the screw, stabilizes without slipping and improves work efficiency. Avoid damaging the screw and screwdriver head Wide range of uses: Made to fit 1/4 In. hex impact drivers drill screw bit set is not only work with impact driver, but also magnetic screwdriver bit perfect for any regular drill, electric,hand screwdrivers and more Overview Brand : GEINXURN Item Length : 1 Inches Material : Alloy Steel Finish Type : Coated Number of Pieces : 22