Using these Deltana 5 x 5 square ball - bearing hinges is easy. First, make sure the door and frame are clean and free of any debris. Then, align the hinge with the pre - drilled holes on the door and frame. Use the provided machine screws and wood screws to secure the hinge in place. Tighten the screws evenly to ensure proper alignment. When it comes to maintenance, you don't have to do much. Periodically wipe the hinges with a dry cloth to keep them clean. If they start to look dull, you can use a mild brass cleaner to restore their shine. Avoid using harsh chemicals or abrasive materials as they can damage the finish. Also, check the screws from time to time to make sure they're tight. If you notice any loose screws, simply tighten them with a screwdriver. With these simple steps, your Deltana hinges will serve you well for a long time.