This is a replacement chip guard (also called a chain brake guard or side cover guard) for larger Stihl chainsaws like the MS440, MS460, MS461, MS660, and their older equivalents (044, 064, 066). Made by Farmertec, it's a brand new, direct-fit part that protects the chain brake mechanism from sawdust, chips, and debris. It's the plastic or metal piece on the side of the saw near the clutch. If yours is cracked, broken, or missing, this guard keeps your saw cleaner and safer. Fitting is usually simple – just a few screws. A small but important part for maintaining your pro saw's longevity and operation. Always ensure it matches your specific Stihl model, but for many popular pro models, this is the right guard. Keep your chainsaw running smoothly and protected with this affordable replacement.