I’m so in love with the Diamancel foot files. The #20 file is the first one I bought and it changed my life. My feet look better after a few minutes of using the files than they do after getting a pedicure at a luxury spa. I recommend using them when you are alone…the dead skin turns into a fine powder after you file it down. The results are amazing – very cool and totally gross at the same time. I added the #11 file and the #10 file a few years ago and have been equally impressed. They are not cheap, but they are if you use my favorite word…AMORTIZE!