Punch-Free Automatic Sensor Door Closer is built to close consistently and securely. Plus, our auto door closer ensures smooth door closure while preventing slamming. Hole-free quick installation. Easy to install with its punch free and adhesive back stickers. No need to drill holes and does Helps close door automatically. Passed 50,000 Tests. Its high-quality steel wire rope has passed the tensile test and rebound weather-proof, no rust, anti-oxidation, anti-corrosion hydraulics. It is a quiet and safe shut-off device. Closer, fire doors. It can also be used as an anti-theft and more.