Designed by Elof Granberg more than 35 years ago, the file-n-joint is anindustry standard for accuracy and durability. This guide file allows yourprofessional chain to right in your bar with precision. Will hold all filesizes for standard chain pitches and lowering depth gauges. Precision bar-mounted chain saw sharpener/file holder made of cast aluminum and zinc-platedsteel. Use calibrated swivel guide markings to set and hold correct sharpeningangle. Integrated features allow users to set file height and tooth length.