Internal Hex, External Hex, Hex, TX, External Torx
AF, Metric, Imperial, Torx, SAE
5/8 ", 3/16 ", 9/16 ", 32 mm, 11/16 "
1/4, 3/8, 2-1/2, 1-1/2, 1/2
6.35, 9.53, 19.05, 38.1, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphated, Oxidised, Black Phosphate, Black Oxide