Internal Hex, Internal Torx, TX, Hex, 6-Point
AF, Torx, Imperial, SAE, Metric
5/8 ", 7/8 ", 5/16 ", 34 mm, 9 mm
9.53, 25.4, 38.1, 6.35, 19.05
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphatized, Oxidised, Black Phosphate, Black Oxide