About Xuanfeng Factory : We are a professional factory with 15 years of production history. Our factory philosophy is to provide our customers with: satisfactory quality of use, high work efficiency, and perfect after- s service. Best for achieving a smooth finish on laminate or veneer finish applications. Cutting Diameter: 1/4'' Cutting Height: 1'' Shank Diameter: 1/4'' Overall Length: 2-1/2'' Compression bits cut down from the top of the stock and up from the bottom of the stock simultaneously. The bit's unique and complex geometry forces the trimmed material to be compressed toward the center of the stock leaving behind a smooth sharp finish of chips on both the top and bottom edges. This bit can also be used for mortising projects that require a smooth bottom surface without sacrificing the mortised edge finish.Solid Carbide Extreme Tool Life Coated Compression Spiral CNC Router Bits with special unique carbide with nACo coating for longer in abrasive material. bits feature a nACo 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. nACo coating is an 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. Coatings prevents high heat and oxidation which is detrimental to cutting tool performance. Multi-colored hues, while attractive, will dissipate upon use and 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. Excellent for cutting: Carbon