Internal Torx, External Hex, TX, Hex, External Torx
AF, Metric, Torx, Imperial, SAE
9/16 ", 3/16 ", 7 mm, 5/16 ", 25 mm
3/8, 1, 1-1/2, 1/4, 2-1/2
25.4, 19.05, 12.5, 6.35, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide