External Hex, Internal Hex, Internal Torx, TX, Hex
Metric, Torx, Imperial, AF, SAE
9 mm, 5/8 ", 11/16 ", 25 mm, 10 mm
19.05, 6.35, 25.4, 38.1, 12.5
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphated, Oxidised, Black Oxide, Black Phosphate