A mortise lock is a type of locking mechanism that is installed into a pocket, or mortise, cut into the edge of a door. This design allows the lock to be flush with the door surface, providing a clean and secure appearance. Mortise locks are commonly used in commercial and residential settings due to their durability and resistance to tampering. These locks typically consist of a lock body, a deadbolt, and a handle or knob. They offer various security features, including multiple locking points and the ability to use different key types, such as keyed cylinders or smart keys. Mortise locks are known for their strength and reliability.