Effective tool to remove callus. But not durable. Remove one star.
Amended comment: Broke down in April 7, 2017.  Works six months only...  :-(  Quite disappointed.  Contacting the seller for warranty information.<br /><br />Works like miracle.  Addicted to use it everyday.  Much much better than using those skin peeling foot mask.  No complaints.  Hope the tool will last longer than 3 years - warranted.
Rating: 4 stars