High Quality Materials: The material of the automatic door closer is made of high-quality steel wire, and the surface is made of high-quality plastic, which is corrosion-resistant and wear-resistant, which has a long service life. Flexibility and Longevity: It does not stick when rotating at high speed, significantly reducing sticking, jamming and noise. The movement has a lifespan of approximately 20,000 cycles. Multifunctional: Multifunctional automatic door closer. Prevents repeated door slamming during learning and working, improves learning and working efficiency, and prevents flies from entering the room. Quick Installation: Installation by 3M adhesive, no need to drill holes, high strength and no damage to the wall, easy to install and heat resistant. Wide Scope of Application: Suitable for all types of aluminum doors, wooden doors, two-way sliding doors, glass doors, screen doors, etc. Suitable for homes, offices and various businesses.