PFERD chain saw files and accessories are available to suit the needs of every chain saw user, from home owner to park manager to logger. PFERD offers a complete line of chain saw files, as well as some innovative and unique tools that will save you time and money, and keep you safer while working with your saw. Sometimes simplicity is the best solution. This guide mounts on the pin of your PFERD plastic chain saw file handle to maintain a proper and precise filing angle of 30 or 35 degrees