Internal Torx, External Hex, TX, Hex, External Torx
Imperial, Torx, AF, Metric, SAE
9/16 ", 13 mm, 5/16 ", 7/16 ", 26 mm
1/4, 1/2, 3/4, 2-1/2, 1-1/2
9.53, 38.1, 25.4, 6.35, 19.05
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide