If you own the lock and forgot the combination, contact Master Lock support with proof of ownership
Check the lock body or packaging for the factory-set combination if it was never changed
Try the original combination if you recorded it when the lock was purchased
Inspect the shackle, dial, or keyway for dirt, rust, or damage that may prevent normal operation
Apply a small amount of lock lubricant if the lock is sticking
Use the correct opening method for your specific Master Lock model
If the lock is attached to your property and you cannot open it, contact a licensed locksmith
If the lock is not yours, do not attempt to open it without permission