Using your Deltana 3 - 1/2 x 3 - 1/2 Square Hinge is easy. First, make sure the door and the frame are clean and free of debris. Align the hinge with the pre - drilled holes on the door and frame, then insert the #10 x 1' wood screws and tighten them using a screwdriver. When opening and closing the door, do it gently to avoid putting too much stress on the hinge. For maintenance, regularly check the screws to ensure they're tight. If the hinge starts to make noise, you can apply a small amount of lubricant. Keep the hinge dry to prevent rust, especially in humid environments. This will help your hinge last longer and keep your door operating smoothly.