The uses of this Cryptex are limited only by your imagination, perfect for sending someone the most special gift. I’m sure your friend will like it. The use of the gifts: Surprise of a courtship, Anniversary of marriage, Valentine’s Day gifts, Birthday gifts, Give baby as a toy, develop intelligence, Play the secret room to escape the game, as a prop, Like collection of friends can be collected, nostalgic.The default password is ILOVEU before shipment. Of course, you can set your password. The initial password is ILOVEU.Then you open it, and there are two rings inside. The first step: arrow pointing at the password and take out. The second step: screwdriver screws out the screw on both sides. The third step: to remove all the 6 cipher circles. The fourth step: put the password letters you want, Put the alignment on the slot The fifth step: install the letters you want to change, and finally assemble, then your new password has been set up.