Beauty Empire Callus Remover is designed to remove or reduce calluses on the skin, typically on the feet. Calluses are thickened, hardened areas of skin that develop as a result of repeated friction or pressure. They often occur on the soles of the feet or the palms of the hands. Rust resistant and professional grade. Made of stainless steel. Comes with 10 extra bladesUse tool on clean feet. To clean is to boil for 30 minutes, soak in with rubbing alcohol or hydrogen peroxide, or wash them with soap and water before wiping them down with rubbing alcohol. This is a set of two callus removers.