Round Oregon chainsaw files: Set of 12 x 4.8mm (3/16") diameter premium round chainsaw files, made from the finest steel, for best hand sharpening results on your saw chain Professional grade saw chain files: Suitable for sharpening Oregon chains as well as other brands, including Husqvarna chainsaws, Stihl chainsaw chains, Ryobi tools and many more Outstanding performance: Superior performance thanks to its sharp teeth, with perfect attack plus resistance to dirt. Removes metal faster and more smoothly Long stay-sharp: Double-cut design resists clogging for long stay sharp. Files fit both the standard file guide and Sure Sharp bar-mounted filing guide Premium quality Oregon chainsaw parts: From saw chains to chainsaw oil, chainsaw accessories and files to lawnmower blades, we lead the way with top quality tools to optimize cutting performance