External Hex, External Torx, Internal Torx, Hex, TX
AF, Torx, Imperial, Metric, SAE
11/16 ", 7/8 ", 3/16 ", 5/16 ", 25 mm
3/8, 1/4, 2-1/2, 1/2, 3/4
38.1, 9.53, 6.35, 19.05, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Oxide, Black Phosphate