Internal Torx, Internal Hex, External Hex, TX, Hex
AF, Torx, Metric, Imperial, SAE
7/8 ", 5 mm, 7/16 ", 5/8 ", 9/16 "
19.05, 25.4, 38.1, 9.53, 6.35
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphatized, Oxidised, Black Phosphate, Black Oxide