External Torx, Internal Hex, Internal Torx, TX, Hex
Imperial, AF, Torx, Metric, SAE
13/16 ", 5/16 ", 7/8 ", 12 mm, 3/16 "
9.53, 6.35, 25.4, 38.1, 19.05
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphatized, Oxidised, Black Phosphate, Black Oxide