These Draper HI-TORQ 6-point deep impact sockets are forged from hardened chrome molybdenum. Black phosphate finish for corrosion protection. Includes sizes 27, 30, 32, 36, 38, 41, 46, 50mm. For use with electric or pneumatic impact wrenches with a 1″ drive. Includes ring and pin. Supplied inside a sturdy plastic storage case with metal hinge and buckle.