External Hex, Internal Torx, Hex, TX, External Torx
Metric, AF, Imperial, Torx, SAE
5.5 mm, 11 mm, 1 ", 5/16 ", 11/16 "
25.4, 6.35, 12.5, 9.53, 19.05
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide