Internal Hex, Internal Torx, External Hex, TX, Hex
Imperial, Torx, Metric, AF, SAE
9/32 ", 11/16 ", 7/8 ", 5 mm, 8 mm
6.35, 25.4, 38.1, 12.5, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphated, Oxidised, Black Phosphate, Black Oxide