External Hex, Internal Hex, Internal Torx, TX, Hex
Metric, Imperial, AF, Torx, SAE
9/16 ", 7 mm, 11 mm, 7/16 ", 11/16 "
19.05, 6.35, 25.4, 38.1, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide