Internal Torx, Internal Hex, External Hex, TX, Hex
AF, Torx, Imperial, SAE, Metric
5.5 mm, 5/16 ", 7/16 ", 25 mm, 10 mm
25.4, 9.53, 12.5, 6.35, 19.05
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide