Internal Torx, External Hex, Hex, TX, 6-Point
AF, Metric, Imperial, Torx, SAE
7/16 ", 9/16 ", 5/16 ", 23 mm, 1-1/2 "
3/4, 2-1/2, 1-1/2, 3/8, 1/2
9.53, 12.5, 19.05, 6.35, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphated, Oxidised, Black Oxide, Black Phosphate