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The Different Types of Locks

The Different Types of Locks

CLK Supplies understands that with the wide variety of lock types, finding the right one can be a major chore. That is why we make it our primary goal to provide you with a huge selection of locksmith tools and locks. Before purchasing locksmith equipment, it can be immensely helpful to become acquainted with some of the most common types of locks. Use the following information to help you select the right tools.


Deadbolts are usually attached to external doors, and can be found in the vast majority of American residences. Single cylinder deadbolts are composed of an external key cylinder with a thumb turn on the inside of the lock. Double cylinder deadbolts replace the thumb turn with an additional key cylinder. Double cylinder deadbolts offer more security, but single cylinder deadbolts are more commonplace. A third, but rare type of deadbolt, the lockable thumb turn, combines the traits of the two more popular types.

Knob Locks

Frequently used to secure indoor rooms, knob locks are designed with a lock cylinder on the knob instead of the door. These locks are very easy to manipulate, so they are not suitable for exterior doors or areas that need to be heavily secured.

Lever Handle Locks

Like knob locks, lever handle locks are most frequently used for interior doors. Instead of a knob, these locks utilize a lever handle, so there is no need to turn them. “Clutch” versions of this lock are more suitable for security, and if an intruder attempts to apply force, no pressure will be applied to the lock. This means that the handle will turn, but the door will remain closed.


Padlocks are some of the most easily recognizable locks, and they are perfect for a variety of purposes. These locks are highly versatile due to the fact that they do not require permanent attachment to a fixture. There are two types of padlocks – keyed and combination. Combination padlocks, which can be found in schools and locker rooms across the country, require users to remember a specific numerical combination in order to gain access.  Keyed padlocks can only be opened with a key.

Euro Profile Locks

As their name suggests, Euro profile cylinder locks are more common in European countries. These locks are held in place by a single screw that extends from one side of the lock to the other. Euro profile cylinder locks can be easy to break off or manipulate if they are not installed correctly.

Wall Mounted Locks

Wall mounted locks are typically used for commercial applications. These locks are mounted on a wall and are sometimes designed to store smaller keys and other items. Most wall-mount locks are installed during the construction process, so they are exceptionally difficult to remove.

Rim and Mortise Cylinder Locks

Rim and Mortise cylinder locks are most often utilized by commercial establishments and glass doors. Rim locks contain a piece of metal that extends from the rear of the lock and passes through the lock itself. Its locking mechanism is on the opposing side of the lock, and it is usually mounted on the inside of the door. Mortise locks require special hardware to hold the lock in place while a cam ensures that the lock performs its intended function.

Jimmy Proof Deadbolts

As their name suggests, jimmy proof deadbolts are notoriously difficult to manipulate. These locks employ a deadbolt that overlaps the jamb bracket, which results in an interlocking surface. They are relatively easy to install but highly effective.

More to Choose From

These are only a select few of the many different types of locks. CLK Supplies has a wide variety of locks and locksmith supplies to choose from. We can help you find a lock that will serve you and your building for years to come.

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