23 piece bit set contained in a study plastic storage case with a EVA foam insert to keep them organised.Bits manufactured from impact quality S2 steel, adaptors from chrome vanadium. Features and Benefits Comes with stainless steel magnetic bit holder with a quick chuck shank & 2 x bit adaptors: 1/4"D, 3/8" D Bits manufactured from impact quality S2 steel, adaptors from chrome vanadium for durability Contents Torx Plus bits: 1/4" Hex: TP10, TP15, TP20, TP25, TP30; 10mm Hex: TP40, TP45, TP50, TP55, TP60. Torx Plus tamperproof: 1/4" Hex: TP10H, TP15H, TP20H, TP25H, TP30H; 10mm Hex: TP40H, TP45H, TP50H, TP55H, TP60H x 10mm Hex in S2 steel. Typical Applications Automotive bit set for Torx Plus fittings