Internal Torx, External Hex, Internal Hex, Hex, TX
Imperial, Torx, AF, Metric, SAE
15/16 ", 7/8 ", 3/16 ", 3/8 ", 11/16 "
9.53, 38.1, 6.35, 19.05, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphatized, Oxidised, Black Oxide, Black Phosphate