The expansion and contraction of the latch is the key function of the lock to realize locking and unlocking. A good quality Latch lock is very flexible in the expansion and contraction process, without jamming phenomenon. This is due to the fit and lubrication between the latch and the sliding parts inside the lock body.

The latch lock needs to be accurately positioned after it has been retracted into place to ensure the reliability of the lock's locking and unlocking status.

The latch lock usually has some anti-pick design to improve the security of the lock. The surface of the latch lock will be designed as a beveled or with special grooves to increase the difficulty of prying.

Latch lock to maintain stable performance in the long-term use of the process. It requires excellent manufacturing process of the latch lock and the high degree of cooperation between the components. In addition, it also need strict quality control in the selection of materials and processing.