External Hex, Internal Hex, Internal Torx, TX, Hex
AF, Torx, Metric, Imperial, SAE
9 mm, 15 mm, 1/4 ", 26 mm, 11/16 "
38.1, 25.4, 9.53, 19.05, 6.35
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide