External Hex, Internal Hex, Internal Torx, TX, Hex
Torx, AF, Metric, Imperial, SAE
5/8 ", 9/16 ", 3/8 ", 26 mm, 29 mm
12.5, 6.35, 9.53, 19.05, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide