Internal Hex, Internal Torx, External Hex, TX, Hex
Metric, Torx, Imperial, AF, SAE
5.5 mm, 11 mm, 9 mm, 18 mm, 11/16 "
6.35, 9.53, 25.4, 19.05, 38.1
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Oxide, Black Phosphate