Impact socket set made of the finest quality SAE 4140 chrome molybdenum high impact steel. TORQUE DRIVE® socket design contacts the fastener on the sides instead of the corners, reducing fastener rounding and allowing up to 20% more torque. Chamfered edges allow easiest socket placement on fastener, increasing productivity and reducing frustration. Extra long deep sockets ensure maximum accessibility. Meets or exceeds US Federal specs GGG-W-660A and ANSI specifications. Blow mould case. Includes 7/16, 1/2, 9/16, 5/8, 11/16, 3/4, 13/16, 7/8, 15/16, 1, 1-1/16, 1-1/8 and 1-1/4 inch deep length.