1. This set of semicircular hinges is made of high quality zinc alloy, with high strength and durability, with an opening angle of 90 degrees and a flush when opening, which is very suitable for writing desktop applications 2. Integrated hinge with adjustable 3D accessories for lid and wooden lid, load capacity up to 10 kg 3. These folding hinges are suitable for kitchen, bedroom, cabinet, closet and other small furniture 4. The 90 degree opening and closing mechanism makes it very convenient to use and fits on the cabinet or cabinet door. It is a reliable product with more than 50,000 opening and closing times Note: The data is all manual measurement, please allow 1 - 3cm error, due to the difference of light and display, there will be a certain color difference, depending on the physical object received.