External Hex, Internal Hex, Internal Torx, TX, Hex
AF, Torx, Metric, Imperial, SAE
9/16 ", 5.5 mm, 9 mm, 7/16 ", 29 mm
9.53, 38.1, 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