I've googled around but couldn't find what I wanted so I though somebody he= re might know the answer. My front door has a single-tumbler deadbolt, that= is, with just a knob inside for unlocking it. I'd like to get some sort of= guard to slip over the knob when I go on vacation so that someone can't ju= st break the glass in the small window, reach through and open the door.=20
I know, a double-tumbler lock would be better but I just wondered if somebo= dy has invented a metal cage gizmo that clips over the edge of the door and= prevents turning the deadbolt knob. Or maybe a double cover where the inne= r part snaps onto the knob while the outer shell turns independently, so th= at reaching in and turning it won't move the knob.