The default password for the puzzle boxes is ILOVEU, you can also set your own passwords (The important thing is that if you want to tell someone a little secret, you can write it on a small note and put it in a puzzle lock). Measures approximately: 14 cm long. The hidden compartment measures approximately: 8 cm long x 2.5 cm in diameter. Exquisite packaging, you can see pictures, I think you will like it! When you open the combination lock, you can see two rings, with puzzle boxes from The Lord of the Rings as gift ideas for adults or wives. Creative and romantic gifts, just for you. Good security, you can also buy more precious rings or necklaces, etc. When you set a new password, just turn the screws and the sequence of letters re-edits 6 password rings. Da Vinci Code Mini Cryptex, Christmas and Halloween are the most popular gifts interesting for friends, children and parents. Father's and Mother's Day, for children, Valentine's Day or any other holiday, a unique and interesting birthday gift for all friends.