Internal Torx, External Torx, External Hex, Hex, TX
Metric, Torx, AF, Imperial, SAE
1 ", 5/16 ", 9/16 ", 3/16 ", 11/16 "
1/4, 3/4, 1-1/2, 2-1/2, 1
12.5, 38.1, 25.4, 6.35, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphated, Oxidised, Black Oxide, Black Phosphate