Step 1: Set dials to factory preset combination: 0-0-0. Step 2: Open the lock by pressing down on the rubber button on the side of the lock. The cable tip will be released. Step 3: With a pen, push the button located on the bottom of the lock. Hold it until completing the next step. Step 4: Set all three dials to your desired personal combination. Be sure to write down your combination for reference once set. Step 5: Release the bottom button and insert the cable tip into the hole. This cable lock may be opened by Transportation Security Administration (TSA) agents utilizing a secured access device, independent from your personal combination.