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