Since 1975, Roper Lock Box has manufactured lock boxes and safety products from Hudson, Ohio, starting with a single combination box for real estate agents and growing into a supplier for emergency services and property-preservation work. Its distinctive Critical Entry Municipality Program now serves more than 100 emergency service departments across over 15 states, helping responders enter participating homes without forced entry. Roper’s Small Four Number Lock Box has sold more than 630,000 units, while its Guardian platform lets customers change combination lids without replacing the vault.