Internal Torx, External Torx, External Hex, TX, Hex
Imperial, AF, Torx, SAE, Metric
4 mm, 13/16 ", 3/16 ", 11/16 ", 9 mm
9.53, 19.05, 6.35, 38.1, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphatized, Oxidised, Black Phosphate, Black Oxide