Manual chain grinding tool, optimized shape, more precise guide, help improve chain saw work efficiency. Optimized shape for more precise guide, help improve work efficiency of the chainsaw. Grinding any chain quickly and easily can make your saw chain sharper and easier to use. Just manually rub forward and backward so that your chain is smooth and shiny again. A handy tool for sharpening teeth and measuring depth in one step. It is a fine quality chain grinding tool, optimized shape for a more accurate guide which helps improve work efficiency of the chainsaw. Both sides of the whetstone are easy to use, allowing user to operate directly on the chainsaw without accidentally injuring the finger. Sharpen any chain quickly and easily, making your saw chain sharper and easier to use. You can try to do it. Features: Hand chain sharpening tool, can easily and quickly sharpen any chain. Optimized shape for a guide more precise, helps to improve the work efficiency of the chainsaw. Handy tool for quickly sharpening teeth and depth gauge in one step. Both sides of the stone sharpeners are easy to use, allowing user to operate directly on the chainsaw without accidentally injuring their finger. Sharpen any chain quickly and easily, making your saw chain sharper and more easy to use. Just manually rub it backwards to make your chain smooth and shiny. Suitable for all sizes of chainsaw. Budget : Material: bearing steel. Color: blue File diameter: 4.8 mm Package contents : 1 chainsaw chain sharpener.