Type of Door Handle Explained
What are the different types of door handle and what is the difference?
Lever Lock, Offset Lever, Slam Shut and Thumb Turns explained...

There are three main types of door handle/locking system, these are lever/lever, latch lock (also known as offset lever) and slam shut. But what do these mean? Let's find out...
Lever Lock
A lever is the simplest type of door handle, commonly found on older doors, back doors and internal doors. The internal and external handles operate on the same spindle so the door can be opened from the inside and outside unless locked with a key. The door is locked by lifting the handle to throw the multipoint locks and turning the key locks the door. For example, if you go outside and the door shuts behind you, you will be able to open the door simply by pressing the lever down.
Latch Lock (Offset Lever)
Commonly found on modern front doors. This system also uses lever handles but the internal and external handles are operated independently from each other. When the door is closed, it is only possible to open it from the inside without using a key, it will lock from the outside. For full security, you need to lift the handle and turn the key to lock. For example, if you go outside and the door shuts behind you, you won’t be able to open it just by pressing the lever down, a key is required to unlock it from the outside.
Slam Shut
Slam shut doors usually have a bar or finger pull on the exterior of the door with a lever, thumb turn, key turn, finger pull or bar for opening from the inside. When the door is pulled/pushed closed, it locks. A key is required to open it from the outside and either a lever, thumb turn or key turn is required to open the door from the inside. Turning the key or the thumb turn to lock the door, engages the deadlock for full security.
What is a Thumb Turn?
A thumb turn lock is thumb-operated knob, similar size to a key that is turned to lock and unlock a door from the inside. A thumb turn can be added onto a slam shut door as a method of opening the door from the inside as well as to engage the dead lock for full security. A thumb turn can also be installed on a door with a lever or a latch lock to allow locking from the inside without requiring a key.











