However, most deadbolts are not very secure.
Vertical deadbolts resist "jimmying", in which an intruder inserts a pry bar between the door and the jamb and attempts to pry the bolt out of the door.
This allows the user to have keyed-alike, and master-keyed systems that incorporate a wide variety of different types of lock, such as nightlatches, deadbolts and roller door locks.
Sheet steel plate can be placed behind or under the deadbolt and wrap the door edge to prevent breaking the door around the deadbolt.
The use of enough strong, supported deadbolts to secure the door is also an advantage against burglary.
Many residents purchased tear gas and new locks and deadbolts for home doors.
She tries to break into the house, going as far as trying to unlock a deadbolt on the front door.
The laboratory itself, a charred wreck, is secured from the rest of the house by a deadbolt so that no one may enter.
