Features: Hexagonal hexagonal fine tooth design provide a more efficient chain grinding experience. Three different types of files, 4.0mm, 4.8mm, and 5.5mm, can accurately adjust the chain teeth shape, making cutting smooth. Crafted from High Carbon Steel, the lifespans of the file is doubled compared to ordinary steel. Its rigidity ensures that it is not easily deformed or worn out during long-term use, suitable for users who work outdoors for long time, and reduces the frequency of tool replacement. Single and double grains file design allows for quick chain grinding without the need for complex operations. Suitable for beginner and experienced users, it solves the problem of difficult operation of traditional files, making it easy to get started with every polishing process. Widely applicable to various occasions such as horticulture and logging, meeting different work needs. Whether it's home garden maintenance or professional logging operations, this file can provide reliable support and improve work efficiency. Suitable for professional forestry workers who require frequent use of chainsaws, it solves the problem of traditional circular files being difficult to polishing accurately. Specifications: Material: High Carbon Steel File diameter 4.0mm, 4.8mm, 5.5mm Package Includes: 1Piece Chainsaw File note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color.