Features: 1. Made of plastic and hardware these hard wall hooks are sturdy enough to last longer; plentiful and varied in size to meet your changing and everyday needs 2. The biggest feature of each hook is that it will not leave any trace on the wall maintaining the integrity of the wall and helping to protect the wall from damage. 3. Easy for hanging large and heavy objects like photos paintings or other hanging ornaments. 4. Applicable to home classroom workplace and other art decoration such as clock blackboard photo frame photo wall small mirror clothes keys umbrella wall decoration luggage office pendants etc. 5. Suitable for all kinds of surfaces: brick wall concrete wall cement wall plaster wall lime wall wood wooden door wallpaper wall. Notice: 1.Actual color may be slightly different from the image due to different monitor and light effect 2.Please allow 1-3cm deviation due to manual measurement Size: As picture show Material: PP plastic includes: 20PCS Invisible Nail Hooks "