Spektra Extreme Tool Life Coated signmaking carbide router bits are engineered with a nACo nanocomposite coating. This micro-thin ceramic coating enhances the cutting edge's sharpness and lubricity, ensuring that every cut is clean, smooth, and precise. The nACo coating not only extends the lifespan of the router bit but also provides heat resistance, allowing you to tackle even the most demanding materials. Spektra router bits maintain cutting performance under extreme conditions. The nACo coating prevents high heat which can degrade tool performance over time. AMS-107-K 3-Pc Pack Includes: 46280-K; CNC 2D and 3D Carving 6.2 Deg Tapered Angle Ball Tip x 1/32 Dia x 1/64 Radius x 1 x 1/4 Shank x 3 Inch Long x 3 Flute Solid Carbide Up-Cut Spiral 46282-K CNC 2D and 3D Carving 5.4 Deg Tapered Angle Ball Tip 1/16 Dia x 1/32 Radius x 1 x 1/4 Shank x 3 Inch Long x 4 Flute Solid Carbide Up-Cut Spiral 45771-K Solid Carbide 30 Degree Engraving 0.005 Tip Width x 1/4 Inch Shank Signmaking