This is an authorized miniature working model of The Da Vinci Code Cryptex. It opens with password you set, and you can change the password at any time. Store your notes, poems, jewelry, keys or other valuables. The uses of this Cryptex are limited only by your imagination, perfect for sending someone the most special gift. A 4" die-cast with an aged finish, this Cryptex features a hidden compartment that measures 3" x 3/4".