Internal Torx, External Hex, TX, Hex, External Torx
AF, Torx, Imperial, Metric, SAE
5/16 ", 3/16 ", 5.5 mm, 9 mm, 8 mm
1/4, 2-1/2, 3/8, 1/2, 3/4
12.5, 38.1, 19.05, 25.4, 6.35
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide