These Draper HI-TORQ® 6-point 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. Ring and pin installed. Supplied inside a sturdy plastic storage case with metal hinges and buckle.