Internal Hex, External Hex, Internal Torx, TX, Hex
Torx, Metric, AF, Imperial, SAE
5/16 ", 9/32 ", 3/16 ", 11/16 ", 9 mm
6.35, 12.5, 25.4, 9.53, 19.05
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide