This term generally refers to the deadbolt section of a handle set or to the individual deadbolt itself.
Single vs double cylinder door lock.
On the other hand single sided deadbolts require key to unlock from the outside only.
A single cylinder has a keyed entry on one side while a double cylinder has keyed entries on both sides.
The number of cylinders inside a lock translates to the number of keyed entries on the door.
Double cylinder deadbolts are locks that require a key to open from both the inside and outside.
Double cylinder door locks.
Single cylinder locks have only one lock cylinder as the name implies.
The difference is that you need to lock the door from both inside and outside with the key.
The single cylinder deadbolt is the most common.
For example if there s a window on or nearby the door think of sidelight windows next to a door for example someone could break the window reach in and turn the deadbolt of a single keyed lock.
This prevents intruders from entering and exiting easily.
Double cylinder deadbolts entry knobs and handlesets require a key for locking and unlocking from both the exterior and the interior of the property.
Single sided deadbolts have a knob on the inside that is used to unlock and lock them from the inside.
Single cylinder locks are usually less costly to purchase and install than double cylinders.
It is found on front or back exterior doors and requires a key to open it from outside.
Just like single door locks you will also require to use the key to lock the door.
A double cylinder deadbolt has no thumb turn.
Double cylinder locks is the number of cylinders.
This means that a key will be required to turn the lock both on the inside of the door and the outside.
Instead the door is unlocked with a thumbturn style lever.
This difference has one primary trade off.
A thumb turn opens it from the inside.
Double cylinder deadbolts or handlesets require a key for locking and unlocking from both the exterior and the interior of the property.
A simple thumb turn locks and unlocks the door.
Doors outfitted with single cylinders are unlocked with a key from the outside but do not require a key for unlocking from the interior of the property.
It means that you will need to use the key to unlock the door no matter which side you are on.
While the single cylinder deadbolt only features a locking mechanism requiring a key on one side the double cylinder deadbolt has it on both.
All deadbolts have a key on the exterior side for security.
The primary difference between single cylinder vs.
Single cylinder deadbolts and handlesets are operated with a key from the outside but do not require a key for locking or unlocking from the interior of the property.
A double cylinder lock also has a key on the inside which is required to operate the deadbolt.
Double cylinder locks contain two cylinders.
This is the main difference between these two types of deadbolts.
