This 4-digit numeric lock box is built for years of use. The Vault Locks 3200 lock box comes with a lifetime warranty. If you"re still hiding your spare keys under the doormat, it"s time for a better, more secure solution. The Vault Locks 3200 Key Safe is a hanging unit that securely holds keys, cards, or anything else you need to put inside. Compact and durable, this key safe will open only when you enter your personalized combination.