External Hex, Internal Torx, Internal Hex, TX, Hex
Imperial, AF, Metric, Torx, SAE
9/16 ", 9 mm, 7 mm, 26 mm, 10 mm
1, 3/4, 1-1/2, 2-1/2, 1/2
38.1, 19.05, 6.35, 25.4, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphatized, Oxidised, Black Phosphate, Black Oxide