Internal Torx, External Torx, Internal Hex, Hex, TX
Metric, Torx, AF, Imperial, SAE
7/16 ", 11/16 ", 23 mm, 25 mm, 1-1/2 "
1-1/2, 3/4, 2-1/2, 1/2, 3/8
38.1, 19.05, 9.53, 6.35, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide