Internal Hex, External Torx, External Hex, Hex, TX
Metric, AF, Imperial, Torx, SAE
11/16 ", 5/16 ", 25 mm, 30 mm, 1-1/2 "
38.1, 9.53, 6.35, 19.05, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphated, Oxidised, Black Phosphate, Black Oxide