Socket wrench set forged from high quality chrome vanadium steel. TORQUE DRIVE® sockets contact the fastener on the sides rather than the corners, reducing corner rounding and allowing 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-641E and Canadian Government specs CDA39-GP-12b and ANSI specification. Standard accessories 48 tooth 8 inch quick release oval head ratchet. 3 and 6 inch extensions. 8 inch flex handle. 1-7/8 inch universal joint. Blow mould case with removable lid. Includes8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19 mm standard length. 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19 mm deep length.