This old File-N-Joint tool works well at every adjustment. I've used it to take gullets out of my chisel-bit chain, but don't use it much anymore. Of course any round file will work in the guide, any depth, any angle. With the "stop" that holds the back of the tooth, you get consistancey at every tooth. This old tool is shown sitting on my bar and chain. Looks like a worker, and works well. Figure 3 pounds from 97454 for confirmation shipping. Money order only please.