The Heavy Duty Door Stopper is designed to provide a secure and stable solution for keeping doors open. Made from high-quality stainless steel and durable rubber, this door stopper is both waterproof and rustproof, ensuring long-lasting performance. Its adjustable spring design allows it to fit doors with floor clearances between 0.8 and 3.1 inches, making it versatile for various door types. The non-slip rubber fasteners on the top and bottom ensure that the stopper stays firmly in place on any surface, including cement, carpet, wood, and tiles. Easy to install, simply press the spring with your foot and slide the stopper under the door. This 2-pack set is perfect for any heavy-duty door, providing safety and convenience in both residential and commercial settings.