External Torx, Internal Hex, Internal Torx, TX, Hex
Imperial, Metric, Torx, AF, SAE
9/16 ", 18 mm, 5/16 ", 11/16 ", 1-1/2 "
38.1, 6.35, 25.4, 19.05, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Oxide, Black Phosphate