Premium Material: This automatic door lock is made of high quality ABS plastic and thick stainless steel, the door closer drawstring is corrosion-resistant, rust-proof, oxidation-resistant, stable, wear-resistant, weather-resistant, silent, safe closing mechanism and long service life. Quick Installation: The door closer with pull cord is installed with non-porous glue, no other tools are needed, easy to install, firm, strong, not easy to stick, does not fall off, does not damage the wall, save time Wide Scope of Application: The door closer with 1000g pull cord is suitable for most doors. This includes doors with strong closing power, wooden doors and screen doors, sliding doors, invisible doors, security doors, aluminum alloy glass doors, wrought iron doors, exterior doors and fire doors. Super tensile strength: The automatic door closer with cord has a super tensile strength of 1000g, 1.2m high-quality wire rope. With a service life of about 8000 tracks, it is designed for a long service life. The automatic door closer is for doors weighing about 800kg and saves you from panicking because you forgot to close the door and gives you a sense of security. Multifunctional door closer with cord: The automatic door closer helps you avoid getting up and opening the door repeatedly when you are busy, improving the efficiency of your study and work. The cable door closer also prevents mosquitoes and flies from entering the room, rats from entering the room and stealing items, and kitchen fumes from entering the living room.