Door Pivot Hinges：With a smooth and wear-resistant solid roller ball, these pivot hinges provide an easier way to swing the door smoothly and quietly. 360 degree rotation, up and down linkage function, easy to install. Made of high quality stainless steel, it is strong and durable, has good wear resistance, corrosion resistance, rust resistance, durability and can be used for a long time. The folding hinge can accommodate 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: Hidden pivot door hinges are ideal for swing doors, kitchen cabinets, wardrobe doors, hinged windows and more. Note: The data are all measured manually, please allow 1-3cm error due to differences in light and display, there may be some color differences, please