Operation Manual: Step 1: Leave dials at the opening combination 0-0-0-0 and pull out shackle. Step 2: Turn shackle 90°and press down as far as it will go. But before press down the shackle, please be aware that the key way on the shackle must align up to the notch on the lock body. Step 3: Holding shackle pressed and set the dials to your own combination. Step 4: Release shackle and return to regular position. Your new lock will now open to your personal combination. To reset a new combination, please repeat step 1 to 4 above. Please remember your new combination.