Internal Hex, Internal Torx, External Hex, TX, Hex
Torx, AF, Metric, Imperial, SAE
5/8 ", 5 mm, 1-1/2 ", 9 mm, 11/16 "
25.4, 6.35, 9.53, 19.05, 38.1
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Oxide, Black Phosphate