Internal Hex, Internal Torx, External Hex, TX, Hex
AF, Metric, Imperial, Torx, SAE
7/32 ", 9/32 ", 11/16 ", 9/16 ", 1-1/2 "
3/4, 1, 1-1/2, 1/2, 2-1/2
6.35, 9.53, 25.4, 19.05, 12.5
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphated, Oxidised, Black Phosphate, Black Oxide