Quick and easy to use.
This is probably the quickest and easiest way to sharpen a chain. Mine was badly damaged by a wire bucket handle hiding in a conifer trunk - who would have thought of that!
A few strokes per tooth sorted it out, the file is very sharp and it doesn't take long at all. There's a lot of more complex jigs out there, maybe they would get closer to perfection but these are tried and tested and simple is sometimes best.
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