1, High Quality Zinc Alloy Metal Construction Magnetic Door Stopper. Brushed Stainless Steel Finish, heavy duty anti corrosion and rust. 2, Powerful Magnet on door stop holds door open. Disengaged by gently pulling door away from the door stop and avoid the door being suddenly closed. 3, The height of the Base is 5MM, thin enough and prevent kicking and stumbling. 4, Self Adhesive: 3M self adhesive provide extra strength and durability, just peel and stick. No Drilling required. You can also install it with screws.