External Torx, External Hex, Internal Torx, TX, Hex
Imperial, Metric, AF, Torx, SAE
7 mm, 5.5 mm, 9 mm, 13/16 ", 7/8 "
1-1/2, 1, 3/8, 2-1/2, 3/4
9.53, 12.5, 19.05, 25.4, 6.35
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide