Internal Hex, Internal Torx, TX, Hex, External Torx
AF, Imperial, Torx, Metric, SAE
1/2 ", 15/16 ", 7/8 ", 5/16 ", 9 mm
38.1, 25.4, 12.5, 6.35, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphatized, Oxidised, Black Phosphate, Black Oxide