Ozone Night Latch with Reversible Latch Bolt | Door Thickness: 30-70mmDouble Stroke Deadbolt: Unlike traditional deadbolts that operate with a single motion when the key is turned, a double stroke deadbolt requires two motions of the bolt when unlocking or locking the door, providing an extra layer of security.. 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 access at night or when