Internal Torx, Internal Hex, External Hex, Hex, TX
Metric, AF, Imperial, Torx, SAE
6 mm, 13/16 ", 7/16 ", 12 mm, 10 mm
3/8, 3/4, 2-1/2, 1-1/2, 1/2
38.1, 25.4, 19.05, 9.53, 12.5
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphated, Oxidised, Black Phosphate, Black Oxide