Ozone Tri Bolt Night Latch for Inside and Outside-opening Doors | Door Thickness: 30-70 mmTriple Deadbolt with Double Stroke: It offers enhanced security through a dual action system. There are 3 deadbolts installed within the lock, and each deadbolt moves twice when the key is turned, providing an extra layer of security compared to traditional deadbolts. Functioning as a basic yet reliable door lock, a night latch is usually installed as an extra security feature. Simple to use, it ensures doors remain secure, preventing unauthorized