keep housekeeping folk from bothering you

privacy door knob

This thing is really cool

You know how most people put a tie around their knob or a “Do Not Disturb” sign to ensure privacy? Well designer Arnaud Lapierre decided that wasn’t enough, so he put together the Doorknob Condition, which is a doorknob that uses a pulley system to retract the entire doorknob, preventing anybody from getting in without breaking down the door.

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