The Master Lock 5420EURD Portable Universal Key Lock Box Select Access® features a 72mm wide metal body for durability. Controlling access to your home, building sites or managing access to multiple properties has never been more convenient. The Universal Select Access® 5420EURD from Master Lock® is the only integrated lock box product on the market that features an adjustable shackle for secure use on almost any type of door hardware. Perfect for portable security or if temporary access is needed across multiple properties, this key lock box is easy to set up and remove from a wide range of handles.