After my pedicurist was no longer there and the search for a new, and especially good pedicurist was very difficult, I decided to try to take the matter into their own hands. After the good reviews of the Twin Callus I chose this rasp. The result is phenomenal. That you can still quickly plus easily remove the cornea with the rough side, with so little effort has then stunned me really. Short refinished with the fine side, and within 10 min. were my feet again presentable. When I consider what I do I have spent approximately every 2 months for pedicure notice that the Callus has paid already after the first time. Rarely have I spent money on something that has been refinanced as soon!