Durable Service: Constructed with zinc alloy, galvanized, and finished with rubber for durability, safety, and long-lasting reliability. This waterproof, anti-collision door stop is perfect for heavy-duty doors, making it the best choice in any environment. Guaranteed Safety: Enjoy complete peace of mind with the anti-collision door stop. The adjustable height and spring function offer a snug fit up to 2.75 inches, unlike shorter doorstops that allow doors to slide open. Non-Slip Stopper: The door stopper is designed with a rubberized finish, ensuring excellent grip on both the floor and the door, and the heavy-duty construction prevents slippage, even in strong winds. Versatile Design: The anti-collision door stop is a good safety solution designed for multiple environments. For garages, corporate businesses, and public areas, it effectively prevents slamming doors thanks to its sturdy frame and adaptive design. Wide range of applications: Designed for heavy-duty commercial swing doors, metal doors, and double doors, the anti-collision door jammer is also suitable for security doors, self-closing hinged doors, and balcony doors.