The lock will come preset with combination 0-0-0 on the Control Panel. The zippers need to be unlocked to set the combination dial. To set your combination: Step 1: To unlock the zippers, make sure the combination reads “0-0-0,” then push the TSA access slider in the direction of the arrow. Both zipper pulls will pop open. Step 2: Using a pen, slide the switch (located to right of the combination dial) in the direction of the arrow and hold it in place. Step 3: While holding the switch, turn the combination dials to the numbers of your choice, then release the switch. Your personal combination is now set.