Internal Torx, Internal Hex, External Hex, Hex, TX
AF, Torx, Imperial, Metric, SAE
5 mm, 3/16 ", 7/16 ", 26 mm, 23 mm
3/8, 1/2, 1, 2-1/2, 1-1/2
19.05, 12.5, 6.35, 25.4, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphated, Oxidised, Black Phosphate, Black Oxide