Wall-mounted key-storage box provides a safe, secure way to keep a key readily available―great for realtors, pet sitters, house cleaners, maintenance workers, and kids after school 4-digit combination can be reset as needed for enhanced security; lock offers 10,000+ possible combinations Cover conceals and protects the combination lock from elements like sand, salt, dust, and dirt to ensure optimal, reliable performance Made with durable aluminum and zinc alloy for rugged strength and rust-resistance; black color and classic style provide a nice appearance Measures 8.6 by 12 by 3.5 cm, Weight: 1.1 pounds, Manufacturer: Amazon