Internal Torx, Internal Hex, External Hex, TX, Hex
Imperial, Metric, AF, Torx, SAE
5.5 mm, 7/32 ", 11 mm, 9 mm, 11/16 "
12.5, 9.53, 6.35, 19.05, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphated, Oxidised, Black Oxide, Black Phosphate