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