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Installing chain lock on door.
The locks consist of two sides the secured side where the chain is firmly bolted and permanently set then the sliding side where the knob at the other end of the chain can be inserted and slid into place.
Security chains are available keyed or un keyed.
How to install a security chain on a door step 1.
A door chain lock is an additional lock to the standard deadbolt and door handle locks that may already be on your door.
Visit your local hardware store or locksmith and see what they have to offer.
Mounting the slide catch too far from the edge of the door might make it impossible to attach detach the chain.
The opening for the chain on the catch is located away from the door edge making it impossible to detach when the door is open.
The slide catch should be mounted close to the edge of the door.