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