EASY TO USE: Punch-free Automatic Sensor Door Closer, Hole-free adhesive installation,good firmness,does not damage the wall,easy installation,high-temperature resistance. [Function]The automatic door closer closes all doors automatically to save heating or air conditioning costs. Avoid standing and opening doors all the time while learning and working to improve learning and productivity. , anti-, no rust, stable, wear-, weather-proof, hydraulics, quiet, safe and reusable [ Super tensile strength]: The high-quality double steel wire rope with diameter of 1.2mm has passed 20000 times of tensile test,The tensile strength is strong and not easy to break [package include & High quality material]You'll get 2 pcs of punch-free closer with steel rope,Our latest automatic door closer is made of high quality ABS shell which is to oxidation, , abrasion, weathering, high temperature and long service life AUTOMATICALLY CLOSE ALL DOORS: Suitable for doors,or doors with a slightly stronger closing force. Doors that open left and right,wooden and metal doors,residential and commercial doors,exterior/inner door closers,fire doors. Please Note: Door closers are not suitable for doors with carpet or too much friction., Manufacturer: Akfldms