Stihl 2 IN 1 EASY FILE CHAINSAW CHAIN SHARPENER 3/8 P 4.0 mm 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. 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. Stihl 2-in-1 4.0 mm Easy File 56057504303