Internal Torx, External Torx, External Hex, TX, Hex
Imperial, AF, Torx, SAE, Metric
5/8 ", 7/8 ", 3/16 ", 25 mm, 9 mm
3/4, 1-1/2, 2-1/2, 1/2, 1
6.35, 25.4, 9.53, 38.1, 19.05
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphatized, Oxidised, Black Phosphate, Black Oxide