Internal Hex, Internal Torx, External Hex, Hex, TX
Imperial, Torx, AF, Metric, SAE
13/16 ", 7/16 ", 5/8 ", 32 mm, 9 mm
1/4, 1-1/2, 1, 1/2, 2-1/2
6.35, 25.4, 12.5, 19.05, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphated, Oxidised, Black Phosphate, Black Oxide