Internal Torx, External Torx, External Hex, Hex, TX
Imperial, Torx, Metric, AF, SAE
8 mm, 12 mm, 23 mm, 1-1/2 ", 11/16 "
38.1, 19.05, 6.35, 9.53, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphatized, Oxidised, Black Phosphate, Black Oxide