Internal Torx, External Torx, External Hex, TX, Hex
Imperial, Metric, Torx, AF, SAE
13/16 ", 3/16 ", 7/16 ", 3/4 ", 11/16 "
3/4, 1-1/2, 3/8, 2-1/2, 1/2
38.1, 9.53, 6.35, 19.05, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide