I give this 2 stars because the door knob portion is actually nice and heavy. The rest of the unit is pretty much useless, particularly for something like a storm door. I used it on a regular sized door and could never get the screws to catch without hitting the latch and causing the unit to stick after several uses . I finally ended up installing a deadbolt for security and using this unit as a "dummy pair" just to pull and push the door open and closed-- basically it is just useful as a handle.