Universal portable lock box. 2-7/8", 72 mm, wide metal body for durability. Set your own combination. Features an adjustable shackle for secure use on almost any type of door hardware, such as lever, ball, biscuit and tulip styles, provides a secure storage location for up to 6 keys. Large internal capacity also allows for storage of key fobs and access cards. Thousands of personalized combination code options. Durable weather cover prevents freezing and jamming. Vinyl coated shackle and molded bumper prevents scratches to your door. Internal dimensions: 4-3/16 in.h x 2-3/8 in. W x 1 in. D.