Spektra Extreme Tool Life Coated engraving and signmaking router bits are engineered with a nACo nanocomposite coating, offering unparalleled durability and longevity. 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 superior heat resistance, allowing you to tackle even the most demanding materials without compromising performance. One of the standout features of our Spektra router bits is their ability to maintain cutting excellence under extreme conditions. The nACo coating prevents high heat which can degrade tool performance over time. With an impressive hardness rating of approximately 4,500 Vickers, these bits boast a solid hardness that outperforms uncoated bits by up to 2.5 times. The multi-colored hues of the nACo coating will fade with use but rest assured that the coating's effectiveness remains intact, consistently delivering results. Whether you're working with wood, composite materials, or other modern substrates, these bits provide exceptional cutting precision, reducing the need for additional finishing work. The enhanced sharpness and lubricity result in cleaner cuts, minimal chipping, and reduced material wastage, making your projects more efficient.