Internal Torx, Internal Hex, External Hex, TX, Hex
Metric, Torx, AF, Imperial, SAE
5/8 ", 5/16 ", 33 mm, 34 mm, 11/16 "
9.53, 6.35, 12.5, 38.1, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide