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. Most sets come with two-tone blow mould case with removable lid for use as an organizer. Meets or exceeds US Federal specs GGG-W-660A and ANSI specifications. Blow mould case with removable lid. Includes 2-1/8, 2-1/4, 2-3/8, 2-1/2, 2-9/16, 2-5/8, 2-3/4, 2-7/8, 3, 3-1/8, 3-1/4 and 3-1/2 inch standard length.