Internal Hex, External Hex, External Torx, Hex, TX
Metric, AF, Torx, Imperial, SAE
13 mm, 9/16 ", 11 mm, 17 mm, 34 mm
25.4, 6.35, 38.1, 9.53, 12.5
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Oxide, Black Phosphate