Pivot Door Hinge, With a smooth and wear-resistant solid roller ball, these pivot door hinges provide an easier way to turn the door smoothly and quietly. 360 degree rotation, linking and locking function, easy to install. Made of premium stainless steel, it is strong and durable, has good wear resistance, corrosion resistance, rustproof, durability and can be used for a long time. Folding hinge provides enough space for two layers of the upper and lower structure. The lower part is fixed to the bottom of the door, the upper part is fixed to the door, and the door rotates around the central axis. The brushed surface, the edges are finely polished to be more rounded without hurting your hands and more beautiful. Widely used, concealed pivot hinges are perfect for swing doors, kitchen cupboards, cabinet doors, casement windows and more.