Outstanding Design: This is a well-designed sharpener. Not only compact and easy to transport, it's quick to set up and simple to use. It will not make sharpening the chainsaw less tedious, but will ensure precise execution.Simple to use: it is as simple to use as a sharpener; Simply place the jig on the bar, position the knob against a tooth, insert the burr through the guide ring, and crank the handle.Precision maintenance: To sharpen the next tooth, pull the chain forward and repeat the process. As you move from one tooth to the next, the ratchet acts as a stop to ensure accurate and repeatable positioning.Perfect choice: standard 30 sharpened front angle, anodized aluminum attachment with a removable crank and a set of guide rings. Can be used for any ...