【Sturdy Metal Construction】：The sturdy metal structure is made of thick stainless steel, sturdy and durable. The surface is specially treated to prevent rust and breakage, fine workmanship, and improve its service life. 【Widely Uses】: Suitable for wooden doors, aluminum frame doors, cabinet doors, hidden doors, etc. Say goodbye to traditional door frame hinges, which are supported by the lower arm and the floor, not the door frame, thereby reducing the pressure on the frame. You can create hidden doors according to your needs 【Unique Design】：Up and down linkage function, 360 degree rotation. Suitable for all styles, installed in the bedroom, kitchen, basement. They create a clean and elegant look. We are a professional factory, the product has been tested. Every detail is designed and produced by our shop. 【Easy to install】：Very detailed and visual instructions. Our instructions list every step for installation, you can do it step by step, it is very easy when you install the hinge