Internal Torx, Internal Hex, External Hex, TX, Hex
AF, Imperial, Torx, SAE, Metric
15 mm, 5.5 mm, 15/16 ", 5/8 ", 11/16 "
6.35, 19.05, 38.1, 25.4, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphatized, Oxidised, Black Oxide, Black Phosphate