Internal Hex, Internal Torx, External Hex, Hex, TX
Imperial, AF, Torx, SAE, Metric
9/16 ", 3/16 ", 5/8 ", 11/16 ", 34 mm
38.1, 9.53, 25.4, 19.05, 6.35
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide