External Torx, Internal Torx, External Hex, Hex, TX
Imperial, Torx, AF, SAE, Metric
7/8 ", 3/16 ", 5/8 ", 9/16 ", 11/16 "
3/4, 1, 2-1/2, 1-1/2, 1/2
19.05, 6.35, 12.5, 9.53, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphated, Oxidised, Black Phosphate, Black Oxide