Internal Torx, Internal Hex, External Hex, Hex, TX
AF, Imperial, Torx, SAE, Metric
4.5 mm, 5/16 ", 11/16 ", 35 mm, 1-1/2 "
9.53, 12.5, 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