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We didn't need this for our home but I like the idea of a little bit extra strength on my door locks. It's definitely sturdy, you can literally leave your doors completely unlocked and lock only this and no one is getting through your door unless that use a sledge hammer or other devise to cut through your door. Very easy to install although do not use the included phillips head screws, they strip easily. I used construction framing screws with torx heads.
easy to install, easy to lock, do the job. Not use the screws that coming with the device, buy new ones on Home Depot, Lowes, what ever place you want, because the quality is not good and you need long screws, like 4 inch long if you want be safe your door..
This lock is very sturdy. It has a learning curve on how to open it. Once you figure it out, it is easy. The plus side to this is that it is essentially child proof as it is very tricky for kids to figure it out. It is used to provide security for intruders getting into the house and to keep the kids in (simply for peace of mind).