External Torx, Internal Torx, External Hex, Hex, TX
Metric, Torx, AF, Imperial, SAE
5/8 ", 5 mm, 25 mm, 30 mm, 1-1/2 "
1/4, 1/2, 1, 1-1/2, 2-1/2
19.05, 12.5, 9.53, 6.35, 38.1
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Phosphated, Oxidised, Black Oxide, Black Phosphate