External Torx, Internal Torx, External Hex, TX, Hex
Imperial, AF, Torx, Metric, SAE
5.5 mm, 9/32 ", 13/16 ", 7/16 ", 11/16 "
38.1, 9.53, 25.4, 6.35, 19.05
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide