Diamond stone sharpener. Easy to use and saves a lot of time cutting easily and piling up firewood quickly. Takes a dull chain and makes it as sharp as new and it holds its edge like a new chain!

It takes some extra time to make the passes however when it get close to a screw it snaps right to it. If the log is not quite round, it isn't quite as accurate. Works for round and square shapes to use on the lathe.

The center finder was not shipped to me. It was returned for an unknown reason. Something is off on the tool.