Practical Design The function of the edgeless loop hook is to fix the back panel of the photo frame so that it fits snugly against the photo frame to protect the photo or artwork. They are a simple but effective solution, making it easy to install and remove the back panels. High-quality Material The edgeless loop hook is made of metal, strong and durable. Rust-proof, corrosion-resistant, and not easily deformed. The iron material provides enough strength and stability to keep the back securely attached to the frame. Proper Size 18 pieces elastic photo frame back panel, 26 mm long and 12 mm wide. This size is designed to fit most common picture frame sizes to ensure the snaps fit snugly against the backing board and frame. Easy to Install Simply insert the tabs between the edge of the frame and the backing board, then press down to secure. Installation is very simple and quick, no drilling required, the frame hooks feature side gears to secure the frame to a variety of small items such as decorative brackets, small screws, non-marking wall hooks, and more. Wide Range of ApplicationsThe picture frame hooks are versatile and suitable for hanging pictures, photos, posters, framed maps, framed postcards, and paintings at home, office, and workplace. You can use it anywhere you need hooks to hang framed photos.