Locksets Information

Locksets are used to operate and secure an entry door. Locksets are complete locking systems that include all the components needed to install a lock. These products are available in various materials, finishes and levels of security. They can be operated by a knob or a lever and can be locked and unlocked with ether keys or electronic keypads.


Locksets include the components to allow for installation of a locking system onto a door. Several different types of locking mechanism can be included in the lockset. The basic components of a lockset include:


Latch- A latch is a type of fastener for the lock. If the lock is part of the door knob, the latch is usually a small knob in the center which can be turned or pushed to lock or unlock the door. A deadbolt may have a latch on the inside that turns to lock or unlock the door.


Case- The case is the housing for the latch of the deadbolt. It can also be the casing around the key slot.


Cylinder- The cylinder is where the key is inserted in the lock. The device is a cylinder shape and recessed in the door.


Tang- The tang runs through the door from the cylinder to the latch case. It is a metal bar found between the latch case and the door.


Screws- The lock, strike plate, and cylinder are attached to the door with screws.



Lockset Image Credit: home.howstuffworks.com



There are two types of lockset bodies.


Cylindrical locksets- Cylindrical locksets have a rounded body that fits into a large hole bored into the door's face and intersects with the latch bolt.  The latch bolt is then inserted into a smaller hole drilled into the door's edge. This design does not include a deadbolt but one can be installed if security is important.


Cylindrical lockset. Image Credit:strongbar.com


Mortise locksets- Mortise locksets are the most common lockset for home use. They have large, rectangular bodies that slide into rectangular pockets (mortises) cut into the door's edge. The body houses the components for the knob or lever handle, latch, and deadbolt. In this lockset design, the knob is interconnected with a deadbolt (i.e. unlock the deadbolt also frees the latch). There are buttons on the door's edge which engage or disengage the lock.


Mortise lockset. Image Credit: tomrubenoff.hubpages.com





Locksets serve a variety of functions and may be application specific.





Locksets Without A Deadbolt      

Classroom lockset

The bolt is retracted by the grip on either side unless locked by the outside key.

Classroom security lockset

The bolt is retracted by the handle on either side. The door can always be opened from the inside but can be locked from inside or outside.

Institutional (asylum) lockset

The bolt is retracted by a key on either side. The handle on both sides are rigid.

Passage lockset

The door can be opened from either side and the door is not locked

Privacy lockset

The bolt is retracted by the grip on either side unless the inside is locked (with thumb-turn, button, or key). The door can then be opened only from the inside unless an emergency release tool is used.

Public restroom lockset

The door is opened from turning the inside handle or using an outside key. The door cannot be locked from the outside

Storeroom lockset

The bolt is retracted by the inside handle or outside key. The outside handle is optional, but when provided is always rigid.

Locks With A Deadbolt   

Apartment Lockset

 The lock is locked or opened by an outside key or inside thumb turn. When the deadbolt is engaged the outside handle is locked and will not open the bolt lock.

 Classroom security locket

 The deadbolt is engaged or retracted by key on either side.  When the deadbolt is locked the outside handle is locked and will not open the latchbolt.  When the deadbolt is locked the inside handle opens the deadbolt and the latchbolt at the same time but leaves the outside grip unlocked.

 Storeroom lockset

The latchbolt is retracted by the handle on either side. The deadbolt is locked or unlocked by the outside key or inside key/thumb-turn. The latch and deadbolt operate independently.  

Store door lockset 

The bolt is opened by a handle on either side. The deadbolt lock is operated by a key on either side. The latch and deadbolt operate independently.  

 Deadbolt Only 


The deadbolt is operated by and outside key. An inside key or thumb-turn is optional.  

Classroom deadlock 

The deadbolt is operated by and outside key. An inside thumb-turn will unlock the deadbolt only (it does not lock the deadbolt). An inside key to lock the deadbolt is optional.  

  Information for chart collected from archtoolbox.com




There are several features to consider when selecting a lockset, these include:

  • Interior/exterior- The location the lock will be used in will affect the material and finish of the lockset.
  • Door/window- Some locksets are designed for use in windows.
  • Easy to install- Locksets can be installed by a professional locksmith or self-installed.
  • Matching keys- If several locksets are being installed, a locksmith may be able to match the locks so the same key can be used in multiple locks.
  • Keyless lock- Lockset knobs can include keypad or magnetic card entry for added security.

Keypad entry lock. Image Credit emtek.com



There are several industry security standards for locks such as the American National Standards Institute (ANSI) and the Underwriters Laboratories (UL). ANSI uses three grades for locks with Grade 1 being the highest level. The grades denote the level of residential security expected.




What is a lockset?

Parts of a Door Lockset

Cylindrical and Mortise Locksets



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