Seamless assembly: two locking clips fit together perfectly 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 clamps durable and long lasting. Easy Installation: Sleek design with countersunk holes and symmetrical screw holes for quick and easy installation. Simply attach a clip to the wall with the long screw with the raised part up, then use the short screw to secure the other clip to the furniture with the raised part down and finally lock. Wide Applications: Interlocking hangers are perfect for holding photo frames, artworks, paintings, posters, headboards, clocks, mirrors and more, bringing elegance to your home and your office. Convenient & 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 items attached to the wall to cleaning or other reasons, you just need to lift them from the stand.