Internal Hex, Internal Torx, External Hex, Hex, TX
AF, Torx, Imperial, Metric, SAE
7/16 ", 3/16 ", 5/8 ", 11/16 ", 32 mm
38.1, 9.53, 19.05, 6.35, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide