Four sanding tools in different grit sizes: 150, 280, 400 and 800. Each abrasive consists in a thin pad attached to a solid plastic support, which allows sanding flat surfaces without deforming them. This product has been designed in a convenient four-step process to eliminate both large and smaller surface imperfections. They can be used on any surface, including parts made of clear plastic, photo-etch, resin or even putties.