Door Pivot Hinges - With a smooth, wear-resistant, solid roller ball, these pivot hinges offer an easier way to rotate the door smoothly and quietly. They rotate 360 degrees and have a linkage function for both up and down movement, making them easy to install. Made of high-quality stainless steel, they are strong and durable, with good wear resistance, corrosion resistance, rust resistance, and long-lasting performance. 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 and finely polished edges are more rounded, less likely to hurt your hands, and more aesthetically pleasing. Widely used: These concealed pivot door hinges are ideal for swing doors, kitchen cabinets, wardrobe doors, hinged windows, and much more.