External Hex, Internal Hex, External Torx, TX, Hex
AF, Metric, Imperial, Torx, SAE
5/8 ", 5/16 ", 9/16 ", 30 mm, 11/16 "
12.5, 6.35, 19.05, 9.53, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphated, Oxidised, Black Phosphate, Black Oxide