External Torx, External Hex, Internal Torx, TX, Hex
Metric, AF, Torx, Imperial, SAE
5 mm, 8 mm, 5/16 ", 11/16 ", 1-1/2 "
9.53, 6.35, 19.05, 25.4, 12.5
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide