NOTE: This magnetic door stops is NOT SUITABLE FOR INSTALLATION ON CARPET, only fits for doors with 6-15mm clearance(door to floor). Magnetic door stopper easy to install - The TWO part of doorstop installation distance should not over 20mm. 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 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 it's 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 - If you're not completely satisfied with the door stopper, then CONTACT US.