18pcs Diamond Chainsaw Sharpener Burr Stone Sharpening Tool-4mm 4.8mm 5.5mm Grin What You Will Get] You will receive 3 kinds of chainsaw sharpening wheels, a total of 18 pieces, and the quantity is enough. It is convenient for you to work and use in your daily life to meet to your diverse needs. Premium Quality] Our diamond chainsaw sharpener is made of high quality titanium coated emery particles, which means the texture is hard and not easy to break, which means you will enjoy a lifetime of 20 % longer of these bits than others without titanium. plated. Easy to Use] These grinding wheels are specially designed for electric chainsaw sharpeners. You can polish it without disassembling the chain, which reduces the number of chain replacements, which is convenient to use and improves efficiency of your work. In just a few minutes, get rid of hand sharpening problems once and for all. Size Type] There are 3 sizes, the first is about 5/32 inch (4mm) in diameter for chainsaw sharpeners, the second is about 3/16 inch (4.8mm), the third measures approximately 7/32 inches (5.5 mm) for large. different sizes correspond to their respective models, which brings you a lot of convenience. Widely Application] Our burr files can be widely used in mechanical and metal polishing, such as cemented carbide, steel bar, chainsaw, jade, gemstone, mold, ceramic, jade, wood and other industries.