Posted on 5/30/2018 by Julie Ernest
In a typical residential home, these are the different types of door locks:
For exterior doors, there are keyed door locks. These locks have a cylinder on the outside that, when locked, requires a key to be inserted to release the latch. The inside portion of a keyed entrance knob or lever will vary according to the manufacturer. For example, one manufacturer may offer a push button lock on the inside that releases when the knob or lever is turned, while another might offer a turn button on the knob or lever itself that must be unlocked manually.
Deadbolts are used to securely lock the door with a bolt that is inserted into the jamb. Deadbolts are available in single cylinder and double cylinder versions.
Handlesets (or front door sets) are most commonly used on exterior entrance doors and do not lock on the handle part but are available with single cylinder or double cylinder deadbolts, or as a dummy set.
Passage/Hall/Closet Knobs and Levers
Knobs and levers for passage doors are non-locking—they do not have keyed cylinders or locking buttons. They provide unimpeded access to any room. Passage, hall, and closet knobs and levers are used on closets, laundry rooms, or other rooms that do not require a privacy lock.
Privacy/Bed/Bath Knobs and Levers
Privacy hardware is generally used on bedrooms and bathrooms, or anywhere that privacy is wanted but an actual keyed lock is not necessary. They provide secure locking from the interior. Locking features for privacy, bed and bathroom door knobs will vary according to manufacturer. For example, they might have a pin hole on the outside, and a push button lock on the inside that releases when the knob is turned. Other brands will have a turn button on the knob itself that has to be unlocked manually, and a pin hole on the end of the knob or on the rosette. In the case of an emergency, they can be unlocked using a generic key provided by the manufacturer that is inserted into the pin hole on the rosette or knob.
Dummy Knobs and Levers
Dummy knobs and levers are one-sided, with no working parts. They are usually surface mounted or mounted from behind. They can be sold in pairs to be used on sets of double doors. Dummy knobs are usually used on shallow closet doors, which may have a ball catch or magnetic catch to keep the door closed when not in use. Dummy door knobs and levers are also often used on the inactive side of a French door.