Product review (2 stars): Beware not good for sliding glass doors
I was so looking forward to this combo lock option for our sliding glass doors. This lock requires you to drill a hole in your sliding glass door which I'm not happy about. The instructions are completely useless. Between the difficult to read instructions and having to drill a hole in my new door, we decided not to attempt to install it. We even attempted to find someone to install it for us and could find no one with experience with this type of lock. I am contemplating sending it back.