Internal Torx, External Torx, External Hex, Hex, TX
Metric, AF, Torx, Imperial, SAE
9/16 ", 9 mm, 12 mm, 1-1/2 ", 11/16 "
6.35, 25.4, 38.1, 9.53, 19.05
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphated, Oxidised, Black Phosphate, Black Oxide