Internal Torx, Internal Hex, External Hex, Hex, TX
AF, Imperial, Torx, Metric, SAE
5.5 mm, 10 mm, 13 mm, 11/16 ", 36 mm
1-1/2, 3/4, 1/2, 2-1/2, 1
6.35, 38.1, 19.05, 12.5, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphatized, Oxidised, Black Phosphate, Black Oxide