External Torx, Internal Hex, Internal Torx, Hex, TX
Imperial, AF, Metric, Torx, SAE
18 mm, 7/16 ", 9/16 ", 11/16 ", 36 mm
25.4, 9.53, 19.05, 6.35, 38.1
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphatized, Oxidised, Black Phosphate, Black Oxide