It has a super resistant magnet! The neodymium magnet, is strong enough to hold and stop the door. Preventing your doors from banging into the adjoining wall. Wide door gap limit! The maximum gap between the floor and the door should be um to 1.18 inches. Very easy to install! It isn't necessary to drill the floor! Produced and developed exclusively by Comfort Door the Magnetic Door Stopper has 3M strong adhesive, wich does not require drilling or use the screws for permanent installation. Remove the adhesive, position and paste. Simple and easy! Super Small and Discreet The unique design suits with any room discreetly, doesn't hinder the passage and its secure for kids and pets.