Owners of hotels read this:
The Doorknob Condition uses an innovated pulley system that makes the knob on the exterior recess inwards when pulled from the inside. Without a knob to use, there’s no way to get it.
You got it? Good! Now I want to see it in action when I’ll go in my next trip.
PCNews Verdict: 8/10 Interesting idea but not enough for your security.