Additional lock with door knob

An additional lock with a door knob is a door-mounted security feature that provides an extra layer of protection and access control to buildings. It consists of a lock mechanism, which is usually mounted on the surface of the door, and a door knob that allows easy opening and closing from one side, usually from the inside.

This type of lock is often used on Entry doors, providing additional security alongside the main lock. An additional lock with a door knob increases the level of security, as it allows the door to be locked from the inside without the need for a key. This is especially useful in situations where you want to be able to close the door quickly and easily from the inside, such as at night.