The Velcro Removable Poster Hangers (Set of 20) feature specially formulated removable adhesive that leaves no wall damage. It is great for hanging pictures or framed decorations on all smooth painted surfaces, glass, metal and more. Uses advanced hanging technology for ease in hanging and adjusting frames for level hanging. Low profile, keeps item flush to wall and secure. Each fastener set (1.5" x 1" strip & 1.75" sq) holds up to 1 lb., do not hang items over 4 lb.