【Durable Steel Material】The folding hinge is made of high-strength cold rolled steel, which is durable, wear-resistant and not easy to rust.【Self-locking Hinge】The foldable hinge can be self-locking whether it is opened to 90 degrees or 180 degrees, or closed.【Unlock Switch】The self-locking hinge comes with an unlock switch, when you need to adjust the board, just press and hold the switch.【Easy to Install】The hinge has mounting screws, which can be easily fixed. (Note: Before the installation, the hand has no support position, these brackets are difficult to be folded or released, so it can be folded normally after it is installed. )【Wide Applicaiotn】Perfect for wood boards with a width not exceeding 30cm, such as furniture table legs, folding wooden bed, Workbench, dining table, DIY platform and other extensive applications, it also can be used as a simple invisible bracket. Note that the maximum load-bearing capacity of a pair of hinges is 30KG/66lbs.