External Torx, Internal Hex, External Hex, Hex, TX
Imperial, Metric, Torx, AF, SAE
5/16 ", 7/16 ", 7 mm, 5/8 ", 35 mm
38.1, 6.35, 25.4, 9.53, 19.05
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide