4 mm uniform chainsaw sharpening file for fast, smooth, aggressive grinding - The file diameter is 4 mm with uniform tooth height to provide fast, smooth, and aggressive grinding with every use. - The file stick fits common tool sizes, helping you match standard chainsaw maintenance tasks quickly. Prevents clogging and keeps your chain sharp - Removes dull, buried metal quickly and easily with precise chainsaw files. - The design helps prevent clogging, keeping the filing action efficient and consistent. Durable steel construction for longer service life - Made from high-quality steel that is wear-resistant and hard, resisting deformation. - Replacing worn files extends the product’s service life. - Easy and convenient to use, saving time and effort during maintenance tasks. Precise file guide for reliable manual grinding - Chainsaw file guide uses precise screw cutting to maintain good sharpness. - Suitable for manual grinding of saw chains. - High-quality workmanship includes sandblasting and demagnetizing for improved performance. Usage scenarios - Home maintenance: sharpen a chainsaw after a weekend of woodcutting in the yard, keeping cuts clean and efficient. - Professional on-site work: quick, reliable sharpening of chains in the forest to minimize downtime and maintain cutting performance. - Workshop routine: use as part of regular chainsaw maintenance to extend chain life and ensure consistent sharpening results.