Reinforce door jambs to help prevent “kick-in” break-ins When a potential intruder tries to get into a home, the wood door jamb at each of the entry doors is one of their prime targets. The FBI reports that 84% of all breaking and entering intrusions can be attributed to failure of a door jamb. One of the best remedies is to reinforce door jambs on all your entry doors. When you install our steel Door Jamb Defender over your door’s wood casing, you’ve turned the lock side of that casing into a steel frame which can resist up to 300 lbs. of force. Door Jamb Defender fits any standard door jamb with 5-1/2” center distance between door latch and deadbolt holes. Includes screws for strong, reliable mounting.