NOTE: This magnetic door stops is NOT SUITABLE FOR INSTALLATION ON CARPET, working well for the door to the floor CLEARENCE between 0mm to15mm, NOT recommend for heavy duty door. ***PLEASE CHECK*** the distance between the door and the floor before purchasing If the distance is greater than 15mm and using for heavy duty meatl door, we suggest to Visit Gudui Stroe for choosing Magnetic Door Stop. Magnetic door stopper easy to install - The Magnetic Part Shoud be installed level to the door frame.Simply install by use double-sided tape mount to the door, NO DRILL REQUIRED There are also mounting screws included in the package for those consumers who prefer drilling installation. STRONG MAGNETIC DOOR HOLDER-- The Heavy Duty Door Stopper is Constructed of High Quality SUS 304 Stainless Steel, Solid, Sturdy and Rust-Proof. The Magnet is Strong Enough to Hold and Catch the Door. The metal finger in the floor plate is not just a decorative cover that provides access to the mounting screws the fact that its hinged is an integral part of how it latches the door open. The magnet that mounts to the door is actually at a slight angle. As the magnet moves over the floor plate, the hinged finger jumps up and the magnet grabs it firmly. The slight angle increases the amount of force needed to slide the magnet off the finger. After-sales Service - Magnetic door stop quality problems occur within one year replacement, lifetime warranty, if youre not completely satisfied with the door stopper, then CONTACT US and we will give you a 100% refund within 90 days of purchase. It is our intention to offer the BEST customer service on Amazon.