
A reference plate has two depending guide lugs. The guide lugs have aligned openings adapted to receive and slideably guide a round file. The file guide is placed over a cutting link of a saw chain with the guide lugs straddling the chain and with the file placed in the gullet of the cutting link. The reference plate rests on the top plate and depth gauge of the cutting link to properly locate the height of the file. A central hole through the reference plate enables the operator to view the fil...











