External Hex, Internal Hex, Internal Torx, Hex, TX
Torx, AF, Imperial, Metric, SAE
7/16 ", 9/16 ", 36 mm, 25 mm, 30 mm
12.5, 6.35, 19.05, 25.4, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphatized, Oxidised, Black Phosphate, Black Oxide