By selecting the right sanding paper, we can easily and quickly obtain a mirror surface, while removing all the so-called lateral growths, i.e. particles of the material being cut, such as aluminum, zinc from the side surface of the knife. Thanks to this treatment, we increase the durability of the tools and eliminate any errors that may arise when installing them on the cutting cage. This service is especially recommended for companies that cut aluminum, copper, galvanized sheets and other soft materials, where during the cutting process fine particles of the material being cut are deposited on the knife surface near the cut edge. The built-up edge is removed during the polishing process without changing the knife thickness tolerance.