Stihl's 2-in-1 Easy File Chainsaw Filing Guide Holder simplifies the process of sharpening With the ease and accuracy of this unique accessory makes it the perfect system for maintenance of your STIHL chainsaw. This 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.