Stihl file holder and guide. Stihl don’t make their own files but they do sell and stock a wide range of file sizes and sharpening equipment for you to maintain your chains. If you are using a chainsaw you need to understand the principles of chain sharpening. Unlike pretty much all other power tools chainsaws are the most labour intensive when it comes to maintenance. Chain sharpening needs ongoing research and experience in order to improve skill level.