Those darn keys they give you for your storage unit locks are awfully easy to lose. I found this out the hard way. I went and bought bolt cutter to get this disc lock off. No fn way was that thing being chopped off. So my wife finally talked some sense into me. I called 24 hour lockouts and he didnt chop saw or bang the lock off. He picked the supposedly unpickable lock right open. Good fast and reliable.