What is a mortice deadlock with 5 levers?
John Castro
Published Mar 01, 2026
What is a mortice deadlock with 5 levers?
5 lever mortice deadlocks are a type of lock that is installed into the door material. The lock can be locked and unlocked using a key, and it has 5 levers to make it more secure. 5 lever mortice dead locks are available in a range of finishes, it can be used on both internal and external doors throughout a building.
How secure is a 5 lever mortice lock?
Be sure to look out for the British Standard kitemark that assures the lock is proof against drilling, picking, cutting or forcing. A 5 lever mortice lock has the classic keys and key hole and a sturdy bolt that engages in a slot recessed in the frame. This means it is strong and will resist a ‘kick-in’ attack.
What is the difference between a mortice lock and a deadlock?
Mortice locks are embedded into the door itself and can only be opened with the key. A deadlock is a mortice lock which has just a key hole and a bolt. A sash lock has a bolt and a latch and a pair of handles. Mortice locks have several lever variations: a 2, 3, 5 or 7 lever mechanism.
What is a mortise deadbolt?
The mortise lock requires a rectangular pocket (also known as the mortise) to be cut into the door so that the lock can be fitted into it. This is what the lock looks like if it has not been installed into the door. Even if you pull down on the handle, the locking bolt stays in place and the door remains closed.
How can you tell if you have a 5 Lever Mortice Deadlock?
You can often identify a five lever mortice deadlock by the following:
- The words ‘5 Lever’ engraved on the internal faceplate of the lock.
- Mostly found on wooden doors.
- Locks and unlocks from the inside and outside with a key.
- The lock sits within the frame of the door.
What is a 5 Lever Mortice Deadlock BS3621?
BS3621 Fortress 5 Lever Mortice Deadlock High security 5 Lever Mortice Deadlock resistant to drilling, hacksawing and picking through steel plates and false notching.
How do I know if my lock is a 5 Lever Mortice Deadlock?
Are mortise locks more secure?
Mortise locks are one of the most secure forms of residential hardware available today. What makes mortise locks so much more secure than their cylinder counterparts? A pocket cut into the short edge of the door, allows a longer and thicker mortise box to slide into the door itself, providing superior protection.
How do you identify a 5 Lever mortice lock?
How to tell a 5 Lever Mortice Deadlock conforms to BS3621
- Kitemark Engraved – The Mortice Lock will have the British Standard Kitemark engraved on faceplate.
- Number of Levers Engraved – Faceplate should state the number of levers the lock has.
Why are mortise locks better?
How do you know if you have a mortise lock?
Examine the length of the door that lines up with the strike plate. More specifically investigate where the deadbolt and/or latch bolt extends from. If the size of the faceplate is approximately the size of your hand then that is an indication that it uses a mortise cylinder.
Are Ultion locks BS3621?
Ultion locks meet the BS3621 British Standard, bear a Kite Mark and are approved by the Police and by insurers.