These clear adhesive hooks are mainly made of SUS304 stainless steel, PVC and PC materials, thus they are very sturdy and super practical. You can use them as plastic bathroom hooks self adhesive shower hooks, kitchen hooks self adhesive ceiling hooks heavy duty adhesive hooks and so on. They are indeed ideal home storage hooks for small item organization at home and help to make our storage life much easier. The max load of these strong sticky back hooks plastic is up to 3KG for long use and this is the conservative figure, in fact when they are properly applied on a smooth, clean and dry surface, the max load may increase to 8KG. They are small adhesive hooks, thus they can be used even on uneven surface. But just be aware that different types of surface may affect the max load of these rotating stick on hooks heavy duty. Your new transparent hooks self adhesive are so easy to install that you just need to clean the surface and let it dry for a few minutes, then press the no drill wall hooks onto the surface. Before you put anything on the plastic stick on hooks you had better wait for 24 hours to allow the glue to completely settle. No drill and no screw! These small clear hooks self adhesive are rustproof, good looking and suitable for a variety of surfaces such as metal, wood, glass, tile and so on. They can stick fast and hard, thus they are not that suitable for walls covered with wallpaper since when taking them off the wall, they may stripped the paper off down to the plaster. Besides make sure they are correctly positioned before pressing on the wall as they are not removable once on the wall. Package includes: round wall hooks adhesive heavy duty small hooks for hanging 12pcs.