Single Vs Double Cylinder Door Lock

A simple thumb turn locks and unlocks the door.

Single vs double cylinder door lock.

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. These locks require a key to lock or unlock the door both from the outside and the inside making them a little safer in one regard. Double cylinder locks contain two cylinders. All deadbolts have a key on the exterior side for security.

A thumb turn opens it from the inside. A single cylinder has a keyed entry on one side while a double cylinder has keyed entries on both sides. This is the main difference between these two types of deadbolts. 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 cylinder locks have only one lock cylinder as the name implies. It is found on front or back exterior doors and requires a key to open it from outside. On the other hand single sided deadbolts require key to unlock from the outside only. They are also more convenient since there s no need for a key to operate the lock from the inside.

The primary difference between single cylinder vs. Instead the door is unlocked with a thumbturn style lever. Single sided deadbolts have a knob on the inside that is used to unlock and lock them from the inside. 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.

Double cylinder deadbolts or handlesets require a key for locking and unlocking from both the exterior and the interior of the property. A double cylinder deadbolt has no thumb turn. While the single cylinder deadbolt only features a locking mechanism requiring a key on one side the double cylinder deadbolt has it on both. A double cylinder lock also has a key on the inside which is required to operate the deadbolt.

The number of cylinders inside a lock translates to the number of keyed entries on the door. This prevents intruders from entering and exiting easily. The single cylinder deadbolt is the most common. This term generally refers to the deadbolt section of a handle set or to the individual deadbolt itself.

Double cylinder locks is the number of cylinders. It means that you will need to use the key to unlock the door no matter which side you are on. This difference has one primary trade off. Just like single door locks you will also require to use the key to lock the door.

Double cylinder deadbolts are locks that require a key to open from both the inside and outside. The difference is that you need to lock the door from both inside and outside with the key. Instead the door is locked or unlocked using a thumb turn style lever. 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.