Internal Torx, External Torx, External Hex, Hex, TX
AF, Metric, Torx, Imperial, SAE
6 mm, 7/16 ", 5.5 mm, 5/8 ", 1-1/2 "
9.53, 25.4, 19.05, 12.5, 6.35
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide