This thing is a hinged retractable door stopper that props magnetic-lock spring-shut doors open when such a situation is needed.

1. Print the thing with mode = "plater".
2. Insert an M3 nut into the nut trap
3. Insert the handle into the base. The flat part that is 90° with the edge that pushes the door is the bottom when facing the door.
4. Thread the hinge + handle with an M3x20 screw from the side opposite the nut.
5. Mount onto the doorframe using some sort of adhesive (3M command tape recommended)