Lock is preset at the factory to unlock at 0-0-0 (Make sure you are able to open and close the lock prior to setting your own combination.) Carefully follow each step to ensure proper setting procedures. Step 1 - Adjust dials so the preset factory combination of 0-0-0 aligns with the markers. Step 2 - Hold cable tip (A) and move toward left to remove from the lock. Step 3 - While pushing in button (B) turn the dials to any combination you choose Step 4 - Release button Step 5 - insert cable tip (A) back into the hole, push down and move all the the way to the right. The lock is now ready to be used with your combination. To change the combination again, repeat steps 1-5