External Hex, External Torx, Internal Torx, Hex, TX
Imperial, AF, Torx, SAE, Metric
15/16 ", 5 mm, 5/16 ", 11/16 ", 25 mm
38.1, 19.05, 9.53, 25.4, 6.35
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Oxide, Black Phosphate