Using the Deltana 13 - 1/8 - inch mail slot is simple. Just install it directly into your front door. When the postman arrives, they can easily drop your mail through the slot, and it will land inside your home. As for installation, make sure to follow the instructions carefully. Before installation, check the size of your door to ensure a proper fit. For maintenance, wipe it regularly with a soft, dry cloth to keep the brass shiny. Avoid using harsh chemicals as they may damage the finish. If you notice any issues, contact the Deltana customer service for assistance.