External Hex, Internal Hex, Internal Torx, TX, Hex
Torx, Metric, AF, Imperial, SAE
5.5 mm, 13/16 ", 9/16 ", 11/16 ", 36 mm
38.1, 9.53, 19.05, 6.35, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphated, Oxidised, Black Phosphate, Black Oxide