The folding brackets are made of galvanized metal iron, which makes them easy to adapt, no matter what style the family is. Due to their size, they are also invisible most of the time Adjustable 90/0, easy to adjust sofa bed, couch or other furniture, self-locking folding table frame, elastic table leg frame with hinge The folding table hinges are ideal for applications where space or flexibility is limited, such as kitchen, laundry, retail/grocery, RV, boat, warehouse, industrial, garage, maintenance warehouse, office/residential warehouse. Place them on the legs or table to fold the legs into a DIY table or bed, fold objects on the table, fold the table extensions, etc. These brackets fold easily and lock themselves for added security. They feature a spring-loaded "forced lock" that can be secured by locking it in the open position. If you're not using a desk or workbench, simply click the lock and fold it down for more space