Sandpaper for pedicure services. The 180 grit sandpaper is used to finish the work so that the skin is smooth and soft. It provides a more hygienic service as the sandpaper is disposable for single use only. You will notice that when you take it out of the box it is half curved, so you need to fold it flat before removing the film. When applying the sandpaper to the plastic backing, apply the film to the top of the sandpaper grain, so that when you press the sandpaper to the backing, it adheres to the backing to avoid hurting your skin. If the sandpaper gets wet, it won't peel off from the plastic backing. Mossi Epil