Dr Scholl Velvet Smooth Electric Foot File Nails Recharge is a set of three nail file attachments. Dr Scholl Velvet Smooth Electric Foot File Nails Recharge is a set of three replacement attachments to be used with Dr Scholl Velvet Smooth nail files. These attachments file, buff and polish nails to ensure a natural, shiny appearance.CharacteristicsDr Scholl Velvet Smooth Electric Foot File Nails Recharge has the following characteristics:Files feature a finely ground texture to give nails a gentle treatment.How to useUse Dr Scholl Velvet Smooth Electric Foot File Nails Recharge on the surface of the nail with one of the three available attachments (filing, buffing and polishing).