The micro pedi replacement rollers remove hard and rough skin on the soles toes and heels of the feet item details the micro mineral rollers spin 360 at 30 times per second smoothing and buffing away hard and dry skin effortlessly to reveal beautifully soft smooth and soft feet for more sensitive skin and sensitive areas of the feet please note that the warrantys for micro pedi electrical goods are two years from date of purchase details can be found in the information booklets provide