Everything that you always wanted to know about deadbolt locks.
The image that you see here is of the cylinder. The cylinder is installed on the outside of the door and contains within it tumblers that are aligned with the grooves in the key to unlock the lock. The ring around the cylinder is called the trim ring or cylinder cover.
As you can see there is not a whole lot to deadbolt locks, although it is recommended to hire the services of a professional locksmith to install your deadbolt lock because you will be guaranteed the correct installation and security of the lock.
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This quick video covers the basics about residential door locks to help you to get familiar with deadbolt locks and their main components.