Package Included: 1 set of Pivot Hinge with Screws, 1 pcs Door Ball Catch HardwareEasy to Installation: Our instructions list each step of the installation, and if you follow it, you will easily install the pivot hingesSturdy Metal Construction: The pivot hinge is made of premium stainless steel, rustproof and corrosion resistant. It supports heavy and wide doors with ease and stability. It is robust and long-lastingInvisible Door: Use this pivot hinge to add a touch of mystery and elegance to your space. You can create a hidden door that rotates 360 degrees.Great for Bookcase Door, Bookshelf Door, Cabinet Door, Panel Door and etcLoad-Bearing: Concealed door hinge is a unique upper and lower link design structure supported by bottom arm and floor, thereby reducing stress on the frame. This gives it more strength and stability to support up to 136kg/300pounds of weight