Heavy duty door stopper:The doorstop is 3 inches high, the spring design can be adjusted to fit any door, and the floor clearance is between 20 and 60 mm. Non slip design:The bottom and top designs are fitted with rubber fasteners and the heavy doorstop does not slide. The rubber holds the floor and door firmly. Durable:Made of 304 stainless steel and durable rubber, our heavy duty door stoppers are waterproof, rust-resistant and rugged, making them ideal for heavy duty doors. Easy to intall:Under the low clearance door, the raised side of the door stopper presses the spring, and then slowly clamps the door to complete the installation Widely used:Door stopper is suitable for any scene, residential, enterprise, school, hotel, garage, etc., the application range is very wide.