These replacement rollers are designed for use with the Pursonic CR360 Foot Callus Remover. They easily buff away rough, dry and cracked skin. These Pursonic callus remover rollers feature micro-mineral particles. They pulverize dead skin in an instant. These rollers are simple to install and wonderful for replacing old or worn out units. They're ideal to have on hand to achieve soft, smooth feet. Use them as needed to reduce the appearance of callused skin. These rollers come in a convenient pack of two.