These Draper HI-TORQ 6-point impact sockets are forged from hardened chrome molybdenum. Black phosphate finish for corrosion protection. Includes sizes 10, 11, 12, 13, 14, 16, 17, 19mm. For use with electric or pneumatic impact wrenches with a 3/8″ drive. Supplied inside a sturdy plastic storage case with metal hingle and buckle.