Scholl Corn & Callus File Scholl Corn & Callus File instantly removes the toughest callus & hard skin. The coarse under side (1 dot on the file head) safely removes even the toughest build up of callus & hard skin, whilst the finer upper side (2 dots on the file head) smoothes away any remaining roughness. The file is shaped for extra comfort & the unique two part design makes it absolutely ideal for travel & storage. It is easy to use, washable & reusable. Directions Ensure feet are clean & dry. Use the coarse side of the file to remove tough build up of callus & hard skin. Use the finer side to smooth away any remaining roughness. For best results finish by massaging with Scholl Deep Moisturising Cream. After use, wash the file with water & leave to dry naturally.