The Stihl 2-in-1 filing guide simplifies the process of sharpening your saw chain by completing two functions at once-sharpening your saw chain cutters and lowering your depth gauges. The ease and accuracy of this unique accessory makes it the perfect system for maintenance of your Stihl chainsaw. The system includes two round files, one flat file and comes with a unique file holder and filing guide. The Stihl 2-in-1 filing guide gets more done with each stroke, so you can spend less time sharpening your saw chain and more time putting your chainsaw to work.