These models are part of a series where the competitor is provided 1 - 2 drawings and you have to complete it in an alotted time. The original drawings are former test type questions, I did not create or design those, however, I created the 3D model and provided the .stl of my model. Enjoy the series filled with obscure geometry all models designed in Solidworks.
If you would like to challenge yourself, for the original drawings visit here:
https://blogs.solidworks.com/tech/2023/02/24-years-of-model-mania.html
The author marked this model as their own original creation.