Internal Torx, External Hex, Hex, TX, External Torx
AF, Metric, Imperial, Torx, SAE
5/8 ", 9/16 ", 11/16 ", 3/4 ", 33 mm
1, 2-1/2, 1-1/2, 3/8, 1/2
38.1, 9.53, 19.05, 6.35, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphatized, Oxidised, Black Phosphate, Black Oxide