A five-point locking system is a security feature typically found on exterior doors of homes and businesses. The system is designed to make it more difficult for burglars to break into a building by reinforcing the door at five key points: the two hinges, the doorknob, the deadbolt, and the strike plate.
Five-point locking systems are not foolproof, but they can provide an extra level of security when used in conjunction with other security measures such as alarms and surveillance cameras.