Internal Torx, External Torx, External Hex, TX, Hex
AF, Torx, Imperial, SAE, Metric
7/16 ", 5/8 ", 9/16 ", 34 mm, 25 mm
1, 1-1/2, 2-1/2, 3/8, 3/4
25.4, 6.35, 38.1, 19.05, 12.5
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphatized, Oxidised, Black Phosphate, Black Oxide