External Torx, Internal Hex, External Hex, TX, Hex
AF, Metric, Imperial, Torx, SAE
9/16 ", 3/16 ", 5.5 mm, 10 mm, 5/8 "
1/2, 1/4, 3/4, 1-1/2, 2-1/2
9.53, 19.05, 38.1, 6.35, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphatized, Oxidised, Black Phosphate, Black Oxide