Internal Torx, External Torx, External Hex, TX, Hex
Metric, Torx, AF, Imperial, SAE
5/16 ", 9/16 ", 5.5 mm, 9 mm, 7/16 "
25.4, 19.05, 6.35, 9.53, 38.1
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide