Internal Hex, Internal Torx, Hex, TX, 6-Point
AF, Torx, Imperial, SAE, Metric
9/16 ", 5/16 ", 5/8 ", 11/16 ", 29 mm
38.1, 19.05, 25.4, 6.35, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide