Solid Carbide Spektra Extreme Tool Life Coated Down-Cut Router Bits featuring special unique carbide with nACo nanocomposite coating for longer lifetime. Specifically designed for milling Polyurethane Foam, Polyethylene Foam, Extruded Polystyrene Foam (XPS), Expanded Polystyrene (EPS) and Neopor to ensure your foam projects are milled with unparalleled accuracy, detail and clarity. These CNC cutting tools allow you to achieve both precision and depth for foam carving and milling applications. Amana Tool Spektra bits feature a nACo nanocomposite coating with an extreme nanohardness and heat resistance. With a brilliant, distinctively-tinted coloring, nACo provides additional improvements in four critical aspects of router tooling.