Internal Torx, External Hex, Internal Hex, Hex, TX
Metric, AF, Imperial, Torx, SAE
7/8 ", 9/16 ", 3/16 ", 5/16 ", 11/16 "
38.1, 9.53, 19.05, 25.4, 6.35
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphatized, Oxidised, Black Phosphate, Black Oxide