Application: apartment doors.
The use of high-quality brass alloy in the tongues and throat, unparalleled construction engineering, not using bearings, which has increased the durability and longevity of the product.

There are plenty of other door locks, and many fall within the seven categories of knob locks, deadbolt locks, cam locks, padlocks, mortise locks, smart locks and keypad locks.
Key Operated Door Locks

Two turns are required to fully lock the door. A fixed handle or pull handle with escutcheon is required on the outside and the key is used to operate the latch. From the inside, the lever handle is used to operate the latch.


Opt for deadbolts, mortise locks with deadbolts, or electronic locks for the exterior doors of a home. Deadbolts are the most secure and sturdy locks—either single-cylinder or double-cylinder. Deadbolts are also rated from Grade 1 to Grade 3. Grade 1 is the highest security.

Although there are many types of locks, the four most common are padlocks, deadbolts, knob locks, and levers.
With simple-to-use latching systems, it's often the baseline choice for many homeowners. The most secure front-door lock is a multi-point lock, which is exactly what it sounds like — a system with more than one point of contact with your door's frame.

The cylindrical lock is the most common of all door locks in use today. They are used to secure office doors, storerooms, and exterior doors. It is named for the locking cylinder located in the knob or lever. Some cylindrical locks require a key to lock and unlock them.