Using the Deltana 4 - inch Residential Letter K is easy. You can use it to mark your residence address or add a personalized touch to a commercial space. Just find a suitable place on your door, wall, or any flat surface and attach it. When attaching, make sure the surface is clean and dry for a better hold. As for maintenance, since it's made of solid brass, you can simply wipe it with a soft, dry cloth regularly to keep it looking shiny. Avoid using harsh chemicals or abrasive materials as they may damage the finish. With proper care, this letter K will serve you well for a long time.