External Torx, External Hex, Internal Torx, TX, Hex
AF, Imperial, Torx, SAE, Metric
5 mm, 7/16 ", 13 mm, 5/16 ", 5/8 "
38.1, 25.4, 6.35, 9.53, 19.05
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide