External Hex, Internal Torx, Internal Hex, TX, Hex
Imperial, Torx, AF, SAE, Metric
6 mm, 13/16 ", 7/8 ", 3/16 ", 12 mm
38.1, 25.4, 9.53, 19.05, 6.35
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Oxide, Black Phosphate