Sturdy and Durable: Made of high carbon hardened steel. After high temperature quenching, the surface is not easy to decarburize, which increases the use time. The secondary cutting accuracy is precise and the tooth surface is clear. 4-in-1 wood file: flat milling cutter, half-circle two-cut, flat wood file, semi-circular wood file, multi-tooth structure, four-way wood file to reasonably enhance the filing rate, and can perform various finishing operations on flat and curved surfaces. Reduce workers' labor intensity and improve work efficiency. Convenient and easy to use: Ergonomic shape style, easy to grip, better control. It works very quickly and only requires a little sanding afterwards. Just grab this little file and file what you need. MULTIPLE USES: This wood rasp can be used not only for wood grinding, but also for polishing soft metal items, soft plastic items, leather, and more.