Premium Material: This automatic door lock is made of high-quality ABS plastic and thick stainless steel. The drawstring on the door closer is corrosion-resistant, rust-proof, oxidation-resistant, stable, wear-resistant, weather-resistant, quiet, safe closing mechanism, and has a long service life. 【Quick Installation】: The drawstring door closer is installed with pore-free adhesive, no other tools are needed, easy to install, firm, strong, not easy to stick, does not fall off, does not damage the wall, saves time. Wide Range of Applications: The 1000g drawstring door closer is suitable for most doors. This includes doors with strong closing force, wooden doors and screen doors, sliding doors, invisible doors, security doors, aluminum alloy glass doors, wrought iron doors, front doors, and fire doors. 【Super Tensile Strength】: The automatic drawstring door closer has a super tensile strength of 1000g, 1.2m high-quality steel wire. With a lifespan of approximately 8000 tracks, it is designed for long life. The automatic door closer is for doors weighing approximately 800 kg and prevents you from panicking about forgetting to close the door and gives you a sense of security. Multifunctional Drawstring Door Closer: The automatic door closer helps you avoid getting up and opening the door repeatedly when you are busy, which improves the efficiency of your studies and work. The cable door closer also prevents mosquitoes and flies from entering the room, rats from entering the room and stealing items, and cooking fumes from entering the living room.