These router cutters from Amana are designed to cut decorate V-grooves and lettering, perfect for sign making. With an edge guide, you can use them to chamfer and cut bevel edges. The 30° 0.005 tip is for extra-fine carving and lettering, and can cut wood, plastic and solide surface materials. The maximum RPM is 28,000. These router bits are excellent for cutting the following materials: 20lbs High Density Urethane Acrylic Composites Composite Decking Foam Laminate MDF/HDF Melamine Plywood PVC Plastic Sign Board Solid Surface Veneered Plywood Wood Xanita® Board With a brilliant distinctively-tinted coloring, the Spektra™ nACo nanocomposite coating provides additional improvements in four critical aspects of router tooling. nACo coating is a micro-thin ceramic coating which enables the tool's cutting edge to retain crucial sharpness and lubricity. This provides longevity and produces cutting results of the highest quality. Coating prevents high heat and oxidation which is detrimental to cutting tool performance. Multi-colored hues, while attractive, will dissipate upon use and yet coating will remain fully effective. nACo offers approximately 4,500 Vickers for impressive solid hardness on cutting areas of the tool, for an increase up to 2.5 times compared to uncoated bits. Note: Blue based color dissipates immediately upon use. nACo® nanocomposite coating will not wear off. Suitable for use with CNC Routers, handheld routers and router tables.-bg