Internal Torx, Internal Hex, External Hex, TX, Hex
AF, Imperial, Torx, SAE, Metric
5/16 ", 13/16 ", 5/8 ", 9/16 ", 3/16 "
9.53, 12.5, 6.35, 25.4, 19.05
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphated, Oxidised, Black Phosphate, Black Oxide