General description The Heavy Duty Door Stopper is designed to accommodate various door heights with its adjustable spring mechanism. Standing at 3 inches (75mm) high, it effectively secures heavy doors in place without slipping. Technical specifications Height: 3 inches (75mm) Adjustable floor clearance: 0.5 to 3 inches Material: Stainless steel and durable rubber Non-slip design with rubber fasteners Installation Step on the raised side of the foot to compress the spring. Slowly clamp the door to complete the installation. Usage Suitable for all surfaces including cement, carpet, wooden floors, and tiles. Designed for heavy duty doors.