These replacement rotary heads are designed for use with Scholl's electric foot file system, specifically engineered for effective callus removal. Featuring coarse grains integrated with diamond crystals, these heads provide intensive yet controlled exfoliation to smooth rough skin on the feet. They are ideal for tackling hard, dry skin build-up on heels and soles, restoring a smooth texture. Replace your existing head when performance diminishes to maintain optimal effectiveness in your routine.