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Single Cylinder Deadbolt Locks
The handleset latch bolt is operated by a thumb piece outside and a grip inside. The single cylinder deadbolt is operated by a key on the outside and a thumb turn on the inside. Single cylinder deadbolts increase convenience by use of the thumb turn on the inside, removing the need to have your key with you when opening your door for someone. They are also useful in areas where fire safety is a concern, as a key is not needed when exiting a building during an emergency.
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