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. About that product: This O-flute bit has a cutting diameter of 1/8, cutting height of 1/2, overall length 2 and 1/4 shank. The nACo micro-thin ceramic coating provides extreme nanohardness and heat resistance to the router bit. 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 tools 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. Benefits of Mirror-Finish: Razor sharp cutting edge Effortless chip removal Helps prevent chip re-weldingDissipates heat well and prevents melting Extends tool life Exceptional cut quality Excellent for cutting: - Plastic/Acrylic - Acetal and Nylon - Acrylic Stone - Acrylonitrile Butadiene Styrene (ABS) - Aluminum Composite Material (ACM) - Alupanel - Corian - Coroplast - Corrugated Plastics such as Correx Boards and Polypropylene -WOOD This bit is specifically designed for milling aluminum. O flute end mills allow for lots of chip clearance which is essential when milling aluminum. Aluminum creates larger chips than most other materials and bits such as O-flute end mills are recommended for proper chip removal. For Customers: Quality assurance. if there are any problem with the item please contact us at first, we will offer new item exchange or refund policy.