Internal Torx, Internal Hex, External Hex, Hex, TX
Metric, Torx, AF, Imperial, SAE
9/16 ", 3/16 ", 5/16 ", 1-1/2 ", 11/16 "
3/8, 3/4, 1-1/2, 2-1/2, 1/2
19.05, 12.5, 6.35, 9.53, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Oxide, Black Phosphate