Outstanding Design: This is a well-designed pencil sharpener. Not only is it compact and easy to carry, it is quick to set up and simple to use. It will not fade #39;chainsaw sharpening less tedious, but will ensure performance precise.Simple to use: it is as easy to use as a pencil sharpener; Simply place the jig on the bar, position the wheel against a tooth, insert the burr through the guide bushing, and crank the handle.Precision Maintenance: for sharpen the next tooth, pull the chain forward and repeat the process. As you advance from one tooth to the next, the ratchet acts as a stop to ensure precise, repeatable positioning.Perfect choice: standard front angle sharpened to 30, anodized aluminum attachment with a removable crank and guide bushing set. Can be used for all chainsaws.