Internal Hex, Internal Torx, External Hex, Hex, TX
Metric, Torx, Imperial, AF, SAE
13/16 ", 5/16 ", 7/8 ", 3/16 ", 9 mm
19.05, 12.5, 25.4, 9.53, 6.35
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide