Review on Defender Security 9850 Housing Aluminum by Chad Guinn

Bought this to keep my son with special needs from running out of the backyard onto the street. They put a wedge in for me, but he figured out how to get it out. So I bought one of these, but it didn't fit flush with one of the sliding glass door pieces. So I used one of the pre-drilled holes on the bottom of the door and screwed it in and screwed the latch to the wood strip. It was secure but not enough so I bought another one for another hole in the door and I haven't seen him try to open the door himself since. I left a wedge at the top for added security in case he guessed one and not the other. I like that the bolts twist and make it difficult to open.