External Hex, Internal Hex, External Torx, TX, Hex
Imperial, Torx, Metric, AF, SAE
3/4 ", 5/16 ", 5/8 ", 9/16 ", 11/16 "
3/4, 2-1/2, 1-1/2, 1/4, 1/2
9.53, 12.5, 19.05, 6.35, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphated, Oxidised, Black Phosphate, Black Oxide