1. Measure up from the floor or existing lockset to locate the lock: its center should be at least 3 1/2" from the lockset center. Tape the template (supplied with lock) to the door. Use an awl to mark the centerpoints of the cylinder and deadbolt holes on the door. Close the door and use the template to mark the centerline for the cleadbolt hole in the door jamb.

2. Bore the cylinder hole with a hole saw and drill. To avoid splintering the door, drill through one side until the hole saw pilot (mandrel) just comes out the other side. Remove the hole saw, then complete the hole from the opposite side of the door.

3. Use a spade bit to bore the deadbolt hole from the edge of the door into the cylinder hole. Be sure to keep the drill perpendicular to the door edge while drilling.

4. Insert the deadbolt into the edge hole. Fit the two halves of the lock to the door, aligning the cylinder tailpiece and connecting screw fittings with the proper holes in the deadbolt. Secure the two halves together with the connecting screws.

5. Use the centerline mark on the jamb to locate the hole for the deadbolt. Bore the hole, then chisel a mortise for the strike plate. Install the strike plate. Or, for greater security, install a security box strike, instead of the standard strike plate.