Internal Torx, Internal Hex, External Hex, Hex, TX
AF, Metric, Imperial, Torx, SAE
9/16 ", 5/16 ", 7/16 ", 1-1/2 ", 9 mm
6.35, 25.4, 9.53, 38.1, 19.05
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide