Do not distrub sign

There are rooms at the university where you cannot see inside, and despite the doors being closed, people came into the room while we were studying. To prevent us from being disturbed while studying, I designed this sign, and the holder is designed so that the door is not damaged. The sign is attached to the holder with simple threads, making it easy to adjust the height of the sign on the door without having to spend more time printing. To prevent others from quickly removing it, the screws that are screwed into the holder have a left-hand thread. Of course, please be careful that no toddlers get their hands on the model, as parts could come loose and be swallowed. Also, not all filaments are chemically harmless and could lead to health consequences. I hope you like the design and that it helps you to have more peace and quiet.