While deadbolts require a standard key to turn the lock are used for additional security when other locks may not be as foolproof. First are single-cylinder deadbolts, have a key for the outside and a simple thumbturn to lock from the inside. Double-cylinder deadbolts work the same way, but with two locks. A jimmy-proof deadbolt is mounted on the door surface in apartment buildings and double doors.
Knob Locks
Knob locks are not as secure on the outside door when used alone, so they are often a lock in the handle used along with a deadbolt.
Lever Handle Lock
This is another lock in the handle which is another interior lock included on lever handles commonly used in commercial locations, with a rotatable knob inside and a key cylinder on the outside. This meets minimal security requirements as well as compliance with the Americans with Disabilities Act.
Vending / T-Handle Lock
This is one more lock used in a handle is the. Often found on ATMs and vending machines, with a spring latch or dead latch, and opening the lock often is the same as removing the lock completely. They work differently, but either way need to be placed back in order to lock the device again.
Mortise and Rim Cylinder Locks
While these are two different locks they are fairly similar. Safer than a deadbolt, they are often glass entry or commercial doors and in apartments. The rim cylinder lock usually includes a long tailpiece running from the back through the door and into the locking mechanism. Separately, the mortise cylinder is threaded on the side and screwed into the hardware in the door. A cam is where the rim cylinder’s tailpiece is located, operating the lock.
Interchangeable Core Cylinders
These locks are operated with two different keys, a standard key for to lock and unlock and a control key removes the core, allowing complete lock replacement.
Rim Latch Locks
Another type of lock, the rim latch lock has a rim latch on one side of the door and a latch lock mounted on the other surface. These are special because they can automatically lock when the door closes. These cannot withstand a great deal of force and should always have by a second lock if they are on the outside door of a home or other building.
Key In Knob (KIK) Cylinders
KIK cylinders are most often used in knob and lever locks, and some deadbolts as well. Without any real standardization for these locks they can be hard to replace when changing brands. Their cylinders may vary greatly in shape and size along with wide differences between the tailpieces that are included in different brands
