Ok, my wife and I have a beatiful home in East New York, two twin boys just learning to walk and open and unlock doors. This is a problem. I kept thinking I was going to come home one day and my children running around in the yard in front of cars or something crazy. So, not sure of what to do my mother in law suggest putting some kind of double sided locks on the doors. From there I went straight to the yellow pages.com and began to find the right company for the job. This company seemed to know what they were talking about, the prices were about the same as everyone else and they could get somebody out that day. Well, we decided to go for it. The Company sent a tech out and all the doors leading to outside then got a double sided lock installed on it. Thank you for the nice handy work like it says in my title.