Another type of lock —— a rim deadbolt —— that can be mounted to the inside surface of an entry door can also be used. Such locks will perform well under a forced entry attack, if they are properly selected. Some rim lock deadbolts actually interlock with the strike (a strike is the part of the lock installed on the door frame). This, in effect, physically interlocks the door to the frame thereby providing a substantial forced entry resistance, if the lock is mounted by carriage bolts (the kind of bolt with a smooth rounded head) and the strike is securely anchored with 3" or greater length.
