Internal Hex, Internal Torx, External Hex, TX, Hex
AF, Imperial, Torx, Metric, SAE
7/16 ", 5/8 ", 11/16 ", 1-1/2 ", 10 mm
1, 1/4, 2-1/2, 1-1/2, 1/2
25.4, 12.5, 19.05, 9.53, 6.35
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide