Our Standard Parts System interlocks your door through the weak doorframe into the studs of your home. A rectangular socket is installed behind your original striker plate so when you engage your Deadbolt, the Deadbolt pin passes through the striker plate into the socket which extends well into the studs of the building. To increase security, a unique system is installed on the hinge side. A pin mounted into the door edge enters a round socket installed in the doorframe that extends well into the studs of the building on the hinge side. The pin interlocks automatically as the door is closed. The system is easily installed using the instructions in the package. To make installation easier and more precise a reusable installation kit is available. Click the “IK” installation kit.