Internal Hex, Internal Torx, External Torx, Hex, TX
Torx, AF, Metric, Imperial, SAE
5.5 mm, 7/16 ", 5/8 ", 9/16 ", 11/16 "
1-1/2, 3/4, 2-1/2, 3/8, 1/2
12.5, 9.53, 6.35, 38.1, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Oxide, Black Phosphate