Features: Make of Stainless steel, the surfaces is electroplated, which is wear-resistant and anticorrosion, strong and Enduring. This product can be folded 90 degrees and automatically lock in the open position through a spring activated lock within the hinge. Self-locking folding hinges are easy to operate. You just clicking the latches and fold down for more space. Suitable for folding leg brackets of folding bed, sofas, dining tables, platforms, tables, coffee tables and other furniture to facilitate better placement and portability. Easy installation and strong carrying capacity. Specifications: Materials: Stainless steel Color: Silver/Black/Color Zincs Size: as shown in the picture Note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 4pcs Hinge