Internal Torx, External Torx, External Hex, Hex, TX
AF, Torx, Imperial, Metric, SAE
15/16 ", 13/16 ", 3/16 ", 12 mm, 13 mm
38.1, 12.5, 6.35, 19.05, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphated, Oxidised, Black Oxide, Black Phosphate