Standard Length 6 Pt. S.A.E. Sockets: 5/16, 3/8, 7/16, 1/2, 9/16, 5/8, 11/16, 3/4-Inch Includes socket rail All components forged from high quality Chrome Vanadium steel Chamfered edges allow easiest socket placement on fastener, increasing productivity and reducing frustration Meets or exceeds U.S. Federal Specs: GGG-W-641E and Canadian Government Specs: CDA39-GP-12b and ANSI specifications