The problem with traditional wooden door frames is that the wood will split open and splinter during a forced attack. A burglary victim, following a 'kick in' attack, would often find that the rim lock screw fixings or the lock staple had not been able to resist the attack and had failed.
To counter this problem, the police and other crime prevention specialists very highly recommend the London Bar to strengthen and reinforce the door frame around the rim lock or cylinder nightlatch. It's easy to fit, is used with existing locks and provides extremely effective additional security every time the door is closed and locked.
A packet of 2 1/2" No. 10 woodscrews is supplied.