The 3M Command Decorative Clips are designed for damage-free hanging indoors. They hold strongly to a variety of surfaces, including solid, hollow, and painted walls, as well as other materials like wood, tile, metal, and glass. These clips are easy to apply and remove, leaving no holes, marks, or sticky residue. They're perfect for hanging items without damaging your walls. The clear design of the clips makes them blend in seamlessly with your décor. Each pack contains 40 clips.