External Hex, Internal Hex, Internal Torx, TX, Hex
Torx, Metric, AF, Imperial, SAE
3/16 ", 7 mm, 11/16 ", 36 mm, 10 mm
38.1, 9.53, 19.05, 6.35, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphated, Oxidised, Black Phosphate, Black Oxide