Using these Deltana 4 x 4 square hinges is easy. First, make sure to choose the right finish and decide if you want to add the decorative finials. When installing, use the #12 x 1 - 1/4 wood screws provided. Drill pilot holes if needed to prevent the wood from splitting. As for maintenance, clean the hinges regularly with a soft, dry cloth. Avoid using harsh chemicals as they might damage the finish. If you notice any signs of wear over time, you can apply a small amount of lubricant to keep them working smoothly. Always check the screws periodically to make sure they're tight. With proper use and care, these hinges will serve you well for a long time.