4.Not easy to break: Our mechanical door stopper is built with a solid Zinc Alloy structure and wear- material, making it strong and outstanding 2.Adjustable Height: Personalize the suction height of our mechanical door stopper to the height of your door crevice. Easily set the range from 10-20mm for a good fit every time 1.Firmly fix the door: Firmly fix your door with our mechanical door stopper, designed to withstand 10-standard strong wind. No need to fear wind weather, our stopper your safety and security with ease 3.Child-proof Security: Equipped with a revolutionary tech-locking mechanism, our mechanical door stopper ensures an added layer of protection to your loved person from slamming doors and trapping tiny hands 5.Easy Application: Enjoy secure and flexible use with this mechanical door stopper's two installation options. Choose between punching or no punching and install with strong double-sided tape or screws for an easy, Manufacturer: Tuidzljd