6-point Impact hex sockets, specifically forged for use on Powered impact tools.Precision cold-forged hardened and tempered chrome vanadium steel. Clear laser-etched sizes and industrial phosphate-coated for tough corrosion resistance. Thick walls provide strength and durability for repetitive high torques. Side wall hole for ball or pin locking to the tool. Contents: 8, 10, 11, 12, 13,14, 15, 17 and 19mm.