When the door opens about 10 degrees, the vacuum acts inside the air support will be inverted. When the door is closed, it can be turned off with a point. Especially when you take something too high, you can also install it to your cabinet, the closet or even dressing tables. High quality, more adjustment methods, long service life, value for money. The lifting support system can stay in any location according to your requirements. This product supports up flipping and overturned, convenient, Manufacturer: Shun Yingtong