Carefully selected combination of Chrome Vanadium and S-2 tool steels Sizes 2, 2.5, 3, 4, 5, 6, 8 and 10mm Anondized aluminum Speed Spinner makes running long bolts in and out quick and effortless machined, chamfered tips allow easier insertion into hex fittings Integrated ''Strip-Gripper'' twisted hex makes removal of most stripped or oversized hexes quick work Sliding T-handle create increased leverage and multiple access positions Tool holder included, easily mounts to any wall, bench or tool box Attributes End Type Straight Measurement System Metric Tool Size Set