diagram detailing individual parts of a standard lockset
Photo: courtesy of Hoppe Group
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Anatomy of an Entry Set

Dead Bolt
For maximum security, should extend 1 inch from door's edge.

Protects door from key scratches and hides holes drilled for lock and thumb latch.

Latch Bolt
Holds door securely against stop.

Lock Cylinder
Accepts key, which operates dead bolt.

Thumb Latch
Retracts latch bolt.

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