Spin the shank around 180 degrees from the opening position and depress.
Keep the shank depressed in this position and move the dials to your desired personal combination code.
Then lift the shank and turn it back 180 degrees to the original position and depress.
To lock the padlock move the dials on to any different numbers, the shank should then be secured in place.
To open the padlock simply move the dials back to your chosen personal combination code and the shank will be released.