Strong Magnetism Door Stopper: The magnet is super strong and keeps the door open securely and firmly without any issues. The magnetism door stopper is suitable for all kinds of doors, especially the heavy doors, which holds your doors open effectively in howling wind. Wall and Door Protector: Magnetic door stop from Crosize prevents your annoying doors from slamming shut. Keeps the doorknobs from damaging and scratching the walls. Moreover, keep air flow, and free your hands when you carrying things. Drilling & Non-drilling Installation Available: It's ingenious and easy to install. You can adhere the stopper with 3M adhesive stickers, and don't need to drill a hole into wall. Also it has screws if you want to make it more permanent. Personally, I will recommend screws which will be sturdier. Suitable for Various Doors and Walls: It can be installed perfectly on various smooth surfaces such as wood, glass, metal, marble walls, etc. Note: Adhesive tape is perfectly sticky for smooth surface, but unsuitable for uneven surfaces. Please use screws to install it permanently.