Scholl ExpertCare File and Smooth 2-in-1 Roller Head Refills give softer, smoother feet effortlessly with just one roller head, making it easy to keep your Scholl ExpertCare File & Smooth foot file working at its best. Each roller head effectively removes very hard skin, and when you are ready to polish you simply flip the roller head 180° and smooth the treated area using the light blue side for a perfect finish. They can be used wet or dry, are easy to use, and are compatible with the Scholl ExpertCare File & Smooth Foot File. We recommend using Scholl roller heads only with Scholl electronic foot files and replacing them every 3 months for ideal efficacy. Pack Contents 2 roller heads. Safety Warning This product is not suitable if you have diabetes, poor blood circulation or loss of feeling in the feet. For external use only. If irritation occurs stop use immediately.