Pretty strong unit
but you might as well just use a dremel.  It is as powerful as some rotary tools out there and if you are not careful you will take your toe off.  I let mine run wild a bit and sliced my foot open.  Be careful if you are diabetic and get this thing.  It is very powerful and you just need to be careful with it and it will smooth out the toughest feet.
Rating: 4 stars