External Hex, Internal Hex, Hex, TX, External Torx
Imperial, Metric, Torx, AF, SAE
9/16 ", 3/16 ", 5.5 mm, 1-1/2 ", 11/16 "
25.4, 6.35, 12.5, 9.53, 19.05
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphated, Oxidised, Black Phosphate, Black Oxide