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 in the popular CHAIN SHARP chain saw sharpeners. Round files for manually sharpening saw chains. Precise spiral cut allows for outstanding sharpness and prolonged chain life. For fast, score-free sharpening of saw teeth. Compared to machine sharpening, these files remove stock sparingly and without thermal loads caused by friction on the metal. Innovative spiral cut for users who prefer a softer filing action.