I have terrible feet. Over the years, I have amassed calluses, and a lot of them. Recently, one was getting a bit painful to walk on. To fix this problem. . . enter Dremel. Yes. . . Dremel. A Dremel Drill looks like this:
In reality, there are tons more attachments for it. The one my mom utilized was one similar to the darker round one shown above. She basically ground off the calluses. It actually didn't hurt, the rotating just made it tickle. It worked quite well, and the calluses are mostly gone.
Yes, this is a very odd story, and no, we are not red necks.