Internal Hex, External Hex, Internal Torx, Hex, TX
AF, Torx, Metric, Imperial, SAE
9/32 ", 8 mm, 3/4 ", 5 mm, 9 mm
1-1/2, 1/4, 1/2, 2-1/2, 3/4
6.35, 12.5, 25.4, 9.53, 38.1
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphated, Oxidised, Black Oxide, Black Phosphate