External Hex, Internal Torx, Internal Hex, Hex, TX
Imperial, AF, Torx, SAE, Metric
9/16 ", 3/16 ", 5/8 ", 29 mm, 9 mm
9.53, 6.35, 19.05, 12.5, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphated, Oxidised, Black Phosphate, Black Oxide