Internal Hex, External Torx, External Hex, TX, Hex
Imperial, Metric, AF, Torx, SAE
11/16 ", 15/16 ", 7/8 ", 3/16 ", 30 mm
6.35, 9.53, 19.05, 38.1, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Oxide, Black Phosphate