Internal Torx, Internal Hex, TX, Hex, External Torx
Metric, AF, Imperial, Torx, SAE
5/16 ", 7/16 ", 3/16 ", 1-1/2 ", 11/16 "
3/4, 1/4, 2-1/2, 1-1/2, 1/2
19.05, 9.53, 38.1, 25.4, 12.5
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphated, Oxidised, Black Phosphate, Black Oxide