External Hex, Internal Torx, Internal Hex, TX, Hex
Torx, AF, Metric, Imperial, SAE
12 mm, 7/16 ", 5/8 ", 23 mm, 36 mm
38.1, 25.4, 19.05, 6.35, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide