they never see what's behind the trim and drywall, but with a standard outside door, there is a space between the door jamb and the wall stud. In the diagram on the left, the lower inset shows that there is a gap of a little over 1/2 inch between the door jamb and the wall stud. There are only a few short screws or nails holding the door frame in place. The door jamb or door frame is typically soft pine wood for looks, not strength.

Once installed the StrikeMaster II Pro not only stops the wood from splintering but the thirteen 2.5" case harden security screws that come standard with the StrikeMaster II Pro penetrate through the frame of the door into the wall studs. The steel strength of Strike Master II Pro, and the shearing strength of the custom security screws, absorbs and disperse the energy from a kick, giving you the safety you are seeking and rendering the kick useless. 

Also, the screws compress the frame, and the hinge side, enough so that your door doesn't stick on the StrikeMaster II Pro the way it would on thicker products.