Doorhicky props open a RAM van rear door for ventilation. We use it on our camper at night. It is plastic, and not for security, but I suspect it will deter or delay an inquisitive raccoon, bear, or in my part of the woods, cow.
Original Prusa 2.5s, Satin powder-coated plate, PETG, 20% infill, supports, ~3 hours.
The author marked this model as their own original creation.