QUIET AND SAFE - The device automatically turns off and locks to ensure peace and safety. During breaks, you don't have to worry about your children running away from home or your dog or cat entering your room. EASY INSTALLATION: With the door closer and the surface mounting of the plastic slide, installation is a breeze. (There is a detailed installation manual in the box, make sure there is no problem with the installation). This spring door closer can be used on doors up to 150 lbs and can be used on both left and right doors. High quality: Antioxidant, anti-corrosion, weather-resistant, stable, wear-resistant, quiet, safe. Quality assurance: More than 500,000 switching tests, salt spray corrosion test of 72 hours minimum, 100% inspection. INCLUDE - Surface mounted spring door closer with instructions, pull rods, slides and plugs to cover the adjustment holes on the closer body after setting the desired tension. Product information Name: Automatic Spring Door Closer Suitable for