I very much doubt anybody will find this model useful since it's so very specific but I am slightly proud of myself for having measured and recreated the original part without any - in TinkerCAD of all things - without any previous CAD experience.

The design is one part of a spring-loaded hinge on the fence keeping our neighbor's dog from crossing into our staircase.

Update 2024-08-05: I didn't realize this model would get any likes or downloads since it was a personal project but I see that it did. Adding the .step file so people can remix it more easily.