specification: Item Type: Foot Grinder Head_x000D_Material: ABS + Quartz_x000D_Diameter: Approx. 4cm / 1.6in Features: 1Quartz sand grinding head has high sharpness, can quickly remove calluses and dead skin on foot, suitable for electric foot grinder. 2Suitable for the hard calluses and dead skin removal, wonderful practical replacement grinding heads for electric foot grinder. 3Designed to remove calluses that have accumulated over the years, will not harm the skin and can effectively remove the dead skin of the feet. 4Meet your daily needs to keep the feet clean and smoothly, can quickly clean the hard skin on the heels, high efficiency and reliable. 5Easy and convenient to install and replace the old or damaged grinding head, make you enjoy a comfortable grinding experience. PackageList: 5 x Foot Grinder Head