Features: Three sizes 4mm/4.8mm/5.5mm option, convenient for you to choose the right file according to the different chain. Selected from high strength steel, which increases the service life of the product. Chain Sawing files are high quality steel, rust and wear resistant, high hardness steel is not easy to deformation, easy and convenient to operate, and saves time and effort. Advanced manufacturing process, high-quality finishing, suitable for chainsaws, chainsaws, household chainsaws and other metal grinding. When polishing chainsaws, the file can only be polished in one directions, not in two directions, otherwise it will damage the file. Specifications: Component:Steel Handle diameter:4mm/4.8mm/5.5mm Package Includes: 1Pc Sharpening File note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item.