Just like single door locks you will also require to use the key to lock the door.
Door lock single cylinder vs double cylinder.
On the other hand single sided deadbolts require key to unlock from the outside only.
A double cylinder deadbolt has no thumb turn.
Double cylinder door locks.
The number of cylinders inside a lock translates to the number of keyed entries on the door.
Double cylinder locks is the number of cylinders.
Double cylinder deadbolts are locks that require a key to open from both the inside and outside.
Double cylinder locks contain two cylinders.
The two main reasons for this are efficiency and economy.
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 is useful for doors with glass panels or near windows.
The single cylinder deadbolt is the most common.
The difference is that you need to lock the door from both inside and outside with the key.
Double cylinder locks this term generally refers to the deadbolt section of a handle set or to the individual deadbolt itself.
Single and double cylinder door locks provide options for exterior doors.
Single sided deadbolts have a knob on the inside that is used to unlock and lock them from the inside.
The primary difference between single cylinder vs.
Single cylinder locks have only one lock cylinder as the name implies.
Single cylinder locks are usually less costly to purchase and install than double cylinders.
A single cylinder has a keyed entry on one side while a double cylinder has keyed entries on both sides.
Single cylinder locks are more common than double cylinder.
It is found on front or back exterior doors and requires a key to open it from outside.
A thumb turn opens it from the inside.
It means that you will need to use the key to unlock the door no matter which side you are on.
Single cylinder use a keyed on the outside and a thumb turn on the inside.
No one can break the glass and operate the thumb turn to enter.
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.
They are also more convenient since there s no need for a key to operate the lock from the inside.
Double cylinder locks is the number of cylinders.
The primary difference between single cylinder vs.
Instead the door is unlocked with a thumbturn style lever.
A single cylinder has a keyed entry on one side while a double cylinder has keyed entries on both sides.
With a double cylinder lock they d still need a key in that case.
This prevents intruders from entering and exiting easily.
This difference has one primary trade off.
So why aren t there any smart double cylinder locks on the market.
Double cylinder locks use a key on both sides.
A double cylinder lock also has a key on the inside which is required to operate the deadbolt.
