DEWALT MAX IMPACT screw driving bits are engineered to last longer than standard bits. The Dual Torsion Zone transfers optimal torque for Impact Driver use, while the optimized tip geometry provides maximum fit, helping to reduce wear, stripping and cam – out. 2.5 in. bits and longer are compatible with the 10X Magnetic Bit Sleeve, providing users with precise placement and screw retention. Insert (1 in. bits) achieve optimized fastener magnetism with the DEWALT MAX IMPACT Bit Tip Holder Features:Longer life versus standard screw driving bit in hard joint application - Designed for use in an impact driver - Optimized tip geometry provides maximum fit, helping to reduce wear, cam – out and stripping of fasteners - Max impact screw driving bits compatible with 10X magnetic sleeve for secure screw retention - Includes 30 – pieces - Genuine DEWALT accessory - Contains:Max Impact 25mm Insert Bit Pocket Case: PH2 × 20Max Impact 63.5mm Power Bits: PH2 × 1, PH3 × 1, SQ2 × 1, HEX5 × 1Max Impact 5/16 Nutsetter x 1DEWALT Torsion Bit Holder x 1Hex Drill Bits: 3, 4, 5, 6