Internal Torx, External Torx, External Hex, Hex, TX
AF, Torx, Imperial, Metric, SAE
7 mm, 8 mm, 5/8 ", 7/16 ", 9 mm
38.1, 25.4, 6.35, 19.05, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphated, Oxidised, Black Phosphate, Black Oxide