On Jul 17, 12:16*pm, Pavel314 wrote:
I've googled around but couldn't find what I wanted so I though somebody here 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 just break the glass in the small window, reach through and open the door.

I know, a double-tumbler lock would be better but I just wondered if somebody 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 inner part snaps onto the knob while the outer shell turns independently, so that reaching in and turning it won't move the knob.


With most residential grade deadbolt locks, what you want
to do is not possible as if you make the inside thumb turn
unable to move you would not be able to lock the door on
the outside using the key because the turn knob is an
integral part of the lock and the tailpiece from the cylinder
is directly connected through the locks bolt into the
shaft of the turn knob...

If you worry about people burglarizing your home when
you are away, either invite someone you know and trust
to house sit for you or install a monitored alarm system...