A good file is a pleasure to use. Some of my friends use Boggs Tool and report good results. I've been meaning to try them out, but every time I have a tired file, some other use comes along. One time, I was working on a one piece hardy tool. I was having a really hard time starting the taper. An expert smith looked over at me and said that I was getting fish lips. That's when the metal folds over the tip and causes a cold shut because it is worked the wrong direction with too gentle of blows. She said it was due to inexperience. I know that the right way to fix this is to cut the lips off or start over. I just kept hammering, and the fish lips got worse. She said that it would crack if I left the cold shut. So I pulled out an old file and a can of borax, and said "time to feed the fish!". With a high carbon bit welded in the split, it worked great. She was not impressed. I just gave another file to a fellow smith to make Viking knives. You can also use them hot when they are not useful for bench work.