Use the screwdriver included in the box for the screws on both sides of the cylinder's edgeRemove all the six cipher circlesSet the letters according the password you want and alignment them to inner slot for each cypher circleAssemble it and then your new password is set and ready!Product InformationProduct size: 6x6x15cm / 23.6x2.36x5.9inchItem Weight: 720g / 1.59 poundsPackage Includes:1 x password lock1 x gift box1 x greeting card1 x jewelry bag1 pair of couple rings