Century 21 Lock Boxes provide a simple, safe solution to keep your property keys stored and manage access to the home that is up for sale. Additionally, you always have quick and easy access to your keys whenever someone asks you to see a house for sale. The product may store numerous keys or key cards and is available in single-lock and double-lock configurations. Additionally, a weather cover can be ordered for added security. The item is made of sturdy materials. These safe, high-quality objects can be mounted on pipes, fences, railings, doorknobs, and other surfaces.