Chain saw files by PFERD are used around the world for sharpening saw chains. They can be used individually with a handle or in combination with depth gauge files with the popular CHAIN SHARP chain saw sharpeners. Round files for manual sharpening of saw chains with precise spiral cut for outstanding sharpness and particularly long tool life. For fast, score-free sharpening of saw teeth. In comparison to machine sharpening, these files remove stock sparingly without thermal loads due to friction on the metal. Innovative spiral cut for users who prefer a softer filing action.