Credo Ceramic Callus Rasp is double-sided to smooth calluses and rough skin. This pedicure aid has been specially designed for gentle removal of light calluses and smoothing of skin previously treated with the callus remover. Use the fine-grade rear of this modern beauty instrument to remove stubborn dirt from hands or feet. Diabetics and sufferers of poor blood circulation to the skin are recommended to contact their doctor before commencing treatment. Always clean your ceramic callus rasp after use by rinsing it off under warm, running water.