【Easy Installation】With surface mounted door closer and sliding plate, easy to install. 【Size】Can bear the weight of the door up to 80kg, suitable for wooden doors with a thickness greater than 35mm and a width greater than 160mm. 【Durable Material】The hidden door closer is made of high quality alloy, strong and durable, long service life. 【Feature】The door closer is to reduce the intensity when you close the door to protect the doors from damage and reduce noise. 【Widely Used】Suitable for all kinds of wooden doors, aluminum frame doors, invisible doors, concealed doors, etc.