This fast lightweight, precision tool sharpens chain teeth exactly and adjusts depth gauges right on the bar. Gives exact cutter tooth filing angles. Keeps 1/4" to 1/2" pitch chain factory sharp. Quickly clamps in place on saw bar. Easy to use and adjust. A new dog leg file holder takes 6" to 8" files in sizes 1/8" to 1/4", as well as normal flat depth gauge jointing files. Permits use of entire file length. File NOT included.