External Torx, Internal Torx, External Hex, Hex, TX
AF, Torx, Imperial, SAE, Metric
8 mm, 16 mm, 11/16 ", 25 mm, 1-1/2 "
3/4, 1, 1-1/2, 2-1/2, 3/8
12.5, 9.53, 6.35, 19.05, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphated, Oxidised, Black Phosphate, Black Oxide