These metal wall hooks for hanging are made of quality SUS304 stainless steel and perfectly designed,thus they are very sturdy and super practical. You can use them as tea towel hooks self adhesive key hooks, stick on picture hooks for walls,bathroom hook 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 extra strong adhesive hooks 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 5KG.They are small hooks self adhesive,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 self adhesive coat hooks heavy duty.Your new kitchen hooks for tea towels are so easy to install that you just need to clean the surface and let it dry for a few minutes,then press the hook onto the surface.Before you put anything on it you had better wait for 24 hours to allow the glue to completely settle.No drill and no screwThese stick on wall hooks 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 contains: metal door hooks self adhesive heavy duty X 10.