Internal Torx, Internal Hex, External Hex, Hex, TX
AF, Metric, Imperial, Torx, SAE
7/8 ", 15 mm, 5/8 ", 1-1/2 ", 11/16 "
38.1, 12.5, 9.53, 6.35, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphatized, Oxidised, Black Phosphate, Black Oxide