Seamless Assembly: Two locking clips fit together seamlessly to form a sturdy locking assembly. Since each photo holder is only 2mm thick, there is very little space against the wall. SUPERIOR SECURITY: Recessed mounting brackets provide ultimate security to prevent mounted objects from falling. High quality cold rolled steel for maximum corrosion resistance makes the wall clips durable and long lasting. Easy Installation: Sleek design with countersunk holes and symmetrical screw holes for quick and easy installation . Simply attach one clip to the wall with the long screw with the raised part up, then use the short screw to attach the other clip to the furniture with the raised part down and finally lock. Many applications: the interlocking hangers are perfect for holding photo frames, artworks, paintings, posters, headboards, clocks, mirrors and more, bringing elegance to your home and office . Convenient and reusable: Heavy duty flush mounting brackets can be used alone for small pendant lights. For large wall mounts, multiple mounts are recommended. When you need to remove objects attached to the wall for cleaning or other reasons, you just need to lift them from the bracket.