When shopping for a new locking door handle or door lock, you’ve likely encountered terms like single cylinder and double cylinder. But what exactly do they mean, and how do you know which one is right for you? Let’s break down the differences and help you make the best choice for your home.
What is a Single Cylinder Lock?
A single cylinder lock has a key-operated lock on the exterior side of the door and a thumb turn (or sometimes a button, depending on the design) on the interior side to lock and unlock the door.
Pros of Single Cylinder Locks:
- Convenience: Easy to operate daily; no need to search for keys when locking from inside.
- Safety in Emergencies: In the event of an emergency, such as a fire, you can exit quickly without needing a key.
- Aesthetic Design: Many single cylinder locks have sleek, attractive designs, enhancing the appearance of your door.
Cons of Single Cylinder Locks:
- Less Security: A potential drawback is that if the door has glass panels, an intruder could break the glass and unlock the door from the inside. This makes it a less secure option against break-ins.
Double cylinder deadbolt (left), single cylinder deadbolt (right)
What is a Double Cylinder Lock?
A double cylinder lock requires a key to operate from both sides of the door. This means that you will need a key to lock and unlock the door from the inside as well as the outside.
Pros of Double Cylinder Locks:
- Enhanced Security: If the key is removed from the lock on the inside, it becomes impossible to unlock the door from either side without the key. This adds an extra layer of security, particularly if you have glass panels or sidelights near your door.
- Dual Functionality in Some Models: Many double cylinder locks offer dual functionality. When the key is left inside the door, it operates like a thumb turn. However, you can also remove the key to increase security, such as when going on holiday.
Cons of Double Cylinder Locks:
- Emergency Safety Concern: If the key isn’t left on the inside, it could be difficult to exit quickly in an emergency. You’ll need to locate the key to unlock the door, which can be a safety issue.
- Not All Models Are Dual-Function: Some double cylinder locks will not work if a key is left on the inside. This means you can’t leave the key in the lock, even if it’s more convenient.
Double cylinder euro cylinder (left), single cylinder euro cylinder (right)
How to Choose Between a Single and Double Cylinder Lock
Choosing between a single cylinder and double cylinder lock depends on your priorities. If you prioritise ease of use and emergency safety, a single cylinder may be the better option. On the other hand, if you’re looking for maximum security, particularly if your door has glass panels, a double cylinder lock could provide the peace of mind you need.
Still unsure? Reach out to the team at Restoration Online for expert advice on selecting the perfect locking system for your door.
