The opening and closing of the case will be flexible and effortless, it is very reliable with more than 50,000 hours of opening and closing. Folding hinge folding case adopting high quality zinc alloy material, smooth surface, abrasion resistant, high hardness. No need to open the hole, easy installation and rounded edge, fits your folding table perfectly and the holes are aligned. Very high quality mechanism that slowly pulls the table surface and closes it for a silent movement. Suitable for many surfaces such as desktop computer, sewing machine, windows, doors and folding table etc. Size: 8x3cm. Number of shipments: 6 pieces