Widely Use: Murphy door hinge kit is a unique upper and lower link design structure, supported by the lower arm and floor so that reducing the pressure of the frame, suitable for wooden doors or aluminum frame doors. Special design for hidden door, heavy duty door, secret door, hidden door bookcase, bookshelf door, swing door, hidden shelf door,and murphy door hinge kit for murphy door.360 Smooth and Quiet Rotation: Up and down linkage, the door can be rotated 360 if hinge installed on the central axis of the door, and rotated 180 if installed on the side, meeting the needs of different styles and scenarios. Whether creating a secret room, installing a hidden bookcase, or improving your doors, this pivot hinge is versatile enough.Heavy Duty Stainless Steel Material: hidden door hinge is made of thickened stainless steel, more sturdy and durable. And the surface is specially treated to prevent rust and breakage even with frequent use. Superior design make it an excellent choice for a variety of hidden and swinging door applications.Package Included: 1 set heavy-duty top and bottom pivot hinge with 30 screws, 1 ball catch hardware with 4 screws, 1 screwdriver and a pair of gloves. And it comes with a manual that lists each step of the installation, you will easily install the hidden door hardware if you follow it.High Load-bearing Capacity: The base of the black door hinges supports up to 620LBS. High-quality stainless steel, high-strength structure, excellent forging process, 34pcs high quality screw fixation and improved pivot mechanism provide quiet, smooth, stable and flexible door movement even under heavy pressure.