The only ones I have used are the ones from home depot and stuff from the set of 5 or 6 for like 10 bucks. They work ok for wooden overlays, but on horn they suck pretty bad. Now I also use one of those round hacksaw blades, which work great and are real fast to cut on wood or horn, but they leave deep scratches in the nocks on horn that can't be burnished out. So I was wondering if anybody knew of a better quality needle file, or a round hacksaw blade that wouldn't leave deep scratches?