I'm a firm believer in the saying that "locks are to keep honest people honest". I had a large Master lock cut off of a shed with a pair of bolt cutters. The would-be thieves dropped the bolt cutters and ran when my neighbors dog barked, she looked over, then screamed when she realized they were trying to break into my shed. They ran and dropped the bolt cutter. They got nothing-I got a pair of very heavy-duty bolt cutters-never used 'em, but I kept 'em, nothing like free tools (well-the cost of a new lock for the shed).