43 Pc. 1/2" Drive Metric Impact Socket Master Set The most complete 1/2 Dr. Metric Impact socket set on the market . Includes standard and deep impact sockets from 9mm - 30mm . Full complement of extensions provides access to virtually all recessed fastener . 1/2 Dr. universal joint adapts any socket for swivel applications . Radius corner design maximizes socket durability while reducing fastener wear over time . All Sunex impact sockets meet or exceed ASME specifications . Forged from high quality CR-MO alloy steel 2569 Yes - NICKEL (METALLIC)