Internal Hex, Internal Torx, External Hex, TX, Hex
Imperial, Torx, AF, SAE, Metric
9/16 ", 11/16 ", 13/16 ", 5/16 ", 29 mm
1/4, 1-1/2, 3/4, 2-1/2, 3/8
38.1, 6.35, 25.4, 9.53, 19.05
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphatized, Oxidised, Black Oxide, Black Phosphate