Internal Hex, Internal Torx, External Hex, TX, Hex
Metric, AF, Imperial, Torx, SAE
5 mm, 3/16 ", 7/16 ", 26 mm, 11/16 "
12.5, 19.05, 6.35, 38.1, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphated, Oxidised, Black Phosphate, Black Oxide