Locks

Lock is a mechanism for keeping a door, window, furniture typically operated by a key. A lock set) is the hardware and components that make up the lock mechanism that can usually be found on a door or other hinged object but can also include sliding doors, dividers, furniture, wardrobes etc The components of a lockset can include (but are not limited to) the door handles (commonly both inside and outside), latch bolt, dead bolt, face plate, strike plate, escutcheon, thumb turn, push button, turn button, and other trim.
A complete set of lock may incorporate a latch bolt, a deadbolt, or may integrate both into a single lockset.
The latch bolt lock is spring-loaded, allowing the door to be closed without first retracting the bolt. There may be a provision on the inside handle to disable (lock) the outside handle from operating the latch bolt A deadbolt lock may be projected only once the door is in the closed position; it will resist being forcibly retracted once it is in its projected position, hence is known as a deadlock Night latches are high security locks for main doors or entrance gates. They are generally provided with a separate handle and a normal lock.
Locks with electronic keys works by means of an electronic current and is usually connected to an access control system.
Further locks also include the furniture and cabinet locks which ensure safety and security of files and other personal items. The locks for furniture and cabinets can be invisible locks which are not visible, or electronic lock with touch pad or a card function or simple multipurpose locks which open and close with a key.