After watching videos on this deadbolt this is one I had to have. With kids it is so easy, we never lock the doorknob we just deadbolt then the kids can always get inside, they are bad to loose keys and have their hands full now they can just use their finger and a 4 digit code. You can set your own code or use the one that comes with it. I have never felt so safe. If you have any doubts, watch the videos on this lock. They can't be broken into. I installed this my self. I highly recommend