So in an effort to make changing your locks easier, Kwickset and Schlage have both come out with locks that allow the homeowner to change the working key of their lock. The way you can tell them apart from normal locks is that the Schlage lock has a + symbol above where you stick the key into. The Kwickset lock has a small hole to the left of where the key enters the lock, as you can see in the pictures. Now as a locksmith I should not like this idea, but I kinda liked the idea. I personally think it would save a person money when they only have one or two locks to change. But as time has gone on us locksmiths have noticed some design flaws in the locks and have noticed that they are much less secure than the normal kwickset and schlage locks. I hear that Schlage has actually taken them off the market because of the amount of problems they were having. If you happen to have one of these lock you may want to consider changing them to the normal pin tumbler style locks. If you would like to look into it further just youtube or google problems with kwickset smartkey or Schlage securekey.