Material: PlasticBattery operated electric foot file with four AA batteries (Not Included) This callus remover helps to get rid of your problem much faster than doing it manually or with traditional tools. This Foot roller use the mineral roller to make stubborn calluses disappear. Feet Care Callus Remover Effectively removes hard skin, cracked heels, rough skin and dry dead skin. Battery not included with product.Fine rollers to buff away the unwanted skin gently yet effectively