Internal Torx, External Torx, External Hex, TX, Hex
Imperial, Torx, AF, Metric, SAE
15/16 ", 7/16 ", 9/16 ", 5/8 ", 11/16 "
1-1/2, 3/4, 2-1/2, 3/8, 1/2
6.35, 25.4, 19.05, 38.1, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphatized, Oxidised, Black Phosphate, Black Oxide