External Torx, Internal Torx, External Hex, Hex, TX
Metric, AF, Torx, Imperial, SAE
9/16 ", 1/4 ", 15/16 ", 5 mm, 5/16 "
25.4, 12.5, 9.53, 6.35, 38.1
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphatized, Oxidised, Black Phosphate, Black Oxide