The Moore Sharks' Tooth™ saw tooth hanger lets you hang your favorite posters, pictures, and plaques safely and securely. This picture hanger features an intense bite that assures a steady hold. You can install this hanger easily with a regular hammer. It works efficiently with a wide range of materials from hardboards to chipboards. The angled teeth of this hanger anchor securely into the material for a secure hold. This saw tooth set comes with 4 pieces of hangers.