Safer and less stress than the razor blade tools
I don't panic using this to help remove calluses.  Easy to use for most calluses except for deep ones.  Works great on the ones sticking out from the foot.  Takes a while but not scary.  Comes with plenty of replacement sandpaper discs (60 of them), but the included brush can clean each sandpaper disc several times before needing to be changed.
Rating: 5 stars