Internal Torx, Internal Hex, External Hex, Hex, TX
Metric, AF, Torx, Imperial, SAE
9/32 ", 15 mm, 5/16 ", 7/16 ", 5/8 "
6.35, 12.5, 38.1, 9.53, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide