Internal Torx, Internal Hex, External Hex, TX, Hex
Imperial, AF, Metric, Torx, SAE
5 mm, 9/16 ", 18 mm, 5/8 ", 11/16 "
1, 1-1/2, 2-1/2, 1/4, 3/4
25.4, 9.53, 6.35, 38.1, 19.05
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphatized, Oxidised, Black Oxide, Black Phosphate