Replacement motherboard standoffs for a vintage Dell Dimension 4100. They clip into the slots on the case and are designed to be used with #6-32 motherboard screws.
I printed them at 20% strength setting and would recommend printing in a material that can withstand higher temperatures. They don't hold great but as a medium solution they are alright and have worked fine so far in my resto-mod case.
The author marked this model as their own original creation.