There are 2 types of Pencil Pointers, the more common ones are in the shape of a business card and have a black or tan sand paper strip on them. They also can be used as eraser cleaners. The business card types have a paper backing that, when removed, has a an adhesive so one can attach them to clean smooth surfaces. The other type is very rare and earlier. It has a brass hanging hook along with a celluloid wrapper with a pack of several long sand paper strips.