Internal Hex, Internal Torx, External Hex, TX, Hex
AF, Imperial, Metric, Torx, SAE
9/16 ", 5/16 ", 11/16 ", 1-1/2 ", 10 mm
1-1/2, 2-1/2, 3/4, 3/8, 1/2
6.35, 25.4, 38.1, 9.53, 19.05
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Oxide, Black Phosphate