Internal Torx, External Hex, Internal Hex, TX, Hex
Metric, Torx, Imperial, AF, SAE
5/16 ", 7/16 ", 9/16 ", 35 mm, 11/16 "
12.5, 25.4, 38.1, 19.05, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide