Door Security Chains and Hotel-type Swing Locks Q&A
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I am trying to install a security chain on my front door, and don't know which side of the lock goes on the door?? Also, do you have any installation tips?
Caveat. You should know that there is a device widely available on the internet (looks like a prybar) that can open these from the outside. This is by design so emergency personnel can get into hotel rooms. Nevertheless, as a means to delay entry into your home, they work just fine (such as giving you time to get your gun or into your safe room).
Do they work? Yes, if you install the lock properly. For extra strength, you might even want to use longer screws than the ones provided with the kit. For example, the door frame side could use screws up to 2" to firmly mount into the structural frame of the door. For the door side, screws with a length 1/8" to1/4" shorter than the thickness of the door will give the most strength. Also, if possible use minimum #10 screws.
Of course, pre-drill all screw holes to make installation easier!