Single Cylinder Locks: Are locked with a key on the outside and locked or unlocked with a thumb turn on the inside. This provides strong security while also allowing ease upon exiting from the interior of the home. The interior is always unlocked unless you choose to lock it.

Double Cylinder Locks: only open with a key on the exterior as well as the interior, this causing a safety risk in an emergency. Double cylinder locks on doors used as an exit in an “emergency is not recommended”. Double Cylinder locking mechanisms moves only when the lock cylinder is rotated, unlike a normal spring bolt action lock, which will open from a blunt force to the bolt. This is known as bumping a lock to gain access. Deadbolts locks are found in digital keyless door locks and electronic door locks.

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