Premium Material: This automatic door lock is made of high-quality ABS plastic and thick stainless steel, the door closer's drawstring is corrosion-resistant, rust-proof, oxidation-resistant, stable, wear-resistant, weather-resistant, quiet, 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, saves time. Wide 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 runs, it is designed for a long