Internal Torx, External Torx, External Hex, Hex, TX
AF, Torx, Imperial, Metric, SAE
9/32 ", 5.5 mm, 5/8 ", 9/16 ", 34 mm
3/4, 1-1/2, 2-1/2, 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
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide