lockbox

A real-estate lock box is a padlock-shaped box that generally hangs around the doorknob of a house that is on the market. The device holds the keys to a house to allow communal access for all real estate agents, while continuing to keep them secure. Permission is generally required from the seller, who is the owner, to install such a device on the door. Lock boxes can also be used for the general storage and security of keys for the use of familial access.