I've had a dagger 2 for about 3 years and it works great and still does after a lot of refrets and fret stones. I can highly recommend it (I'm a retired guitar maker repairer 50 years under my belt) This files as good if not better than my old german files and funily enough you can use both edges with thin and wide fretwire. Only improvement could be some of that liquid plastic on the handle to make it more comfortable (I used some gaffa tape)CheersAndrew