External Hex, External Torx, Internal Torx, TX, Hex
AF, Imperial, Torx, SAE, Metric
7/16 ", 8 mm, 13/16 ", 25 mm, 29 mm
3/4, 1-1/2, 2-1/2, 1, 1/2
38.1, 19.05, 25.4, 6.35, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphatized, Oxidised, Black Phosphate, Black Oxide