Removes calluses & smooths skin. Infused with silver. The beauty tool experts. Sole Smoother Antibacterial Callus Stone: Premium quality, two-sided German-made ceramic stone. Use rough side to reduce calluses and fine side to smooth feet. Ceramic stone and ergonomic handle are waterproof and infused with silver to protect from bacteria and germs. This item is electronically protected. Cruelty-free.