FEATURES 100% Brand & High qualitywaterproof and rustproof This is a Magnetic Door Stop. Can install with nails or Nail-free stickers.Punching-free is easy to install 3M strong adhesive is not easy to fall off. The Magnetic Door Holder consists of two parts: the floor fitting and the door  fitting. The Magnetic Door Catch has a magnet that keeps the door open when you  want it. It stops the door from slamming from the wind and the kids from  slamming the door into the wall. SPECIFICATIONS Color: Silver/ bronze Material: Zinc Alloy Base Diameter: 59mm The distance between the door and floor should be within 5-9mm