Internal Hex, Internal Torx, External Hex, TX, Hex
Torx, Metric, AF, Imperial, SAE
9 mm, 5/16 ", 7/16 ", 26 mm, 10 mm
19.05, 12.5, 38.1, 6.35, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide