Product material: The random stop support hinge is made of durable zinc alloy, which can better prevent the surface of the hinge from oxidizing, and also has better corrosion resistance, keeping the product as new as new and prolonging the service lifeof the hinge. The package includes: 2 pieces of cabinet cover support hinge set combination, each combination has a package, and each package has 1 door support hinge main structure, 4 self-tapping screws, 4 plastic washers, 4 large bolts, 1 One Allen key, one right-angleear and one parallel ear. Before installation, please assemble the hinge. Product performance: It can be adjusted in multiple angles, and the door can be adjusted in three maximum angles of 75, 90 and 110. The hinge will keep the door open until you want to close it; the tightness of closing can be adjusted. , Just usethe included Allen wrench to turn the bolt in the middle of the arm; Installation process:Support side and top installation. According to the requirements of the door panel, first mark the two drilling points, and then screw the right-angle ears and parallel ears with self-tapping screws according to the instructionsto fix the hinges. Detailed installation instructions are attached to the back of the packaging bag. When using 2 cover struts, Lid or door panel with a maximum support of 40 pounds Widely used and service:The adjustable cover bracket is suitable for wooden storage boxes, cabinet covers, kitchen cabinet doors, storage wooden boxes, open cabinet lids or flip panels, workbench tables, bookcases, load-bearing shelves by the window,etc. I hope you will like us Provided products, if you have any questions, please contact us in time, we will provide you with services as soon as possible