These are desk/table edge hex driver holders to keep entire sets organized. The specific sets are as follows:
Black - https://www.amazon.com/gp/product/B0BHSYTJP3/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
Blue - https://www.amazon.com/gp/product/B000189SL8/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
These files should fit the above referenced sets unmodified. Should you need to make modifications, I have provided STEP and SOLIDWORKS design files. Note: The Solidworks models were created with the Maker Edition and subject to the limitations of that platform.
I typically print these with the top flat to the print bed for the best surface finish on the most appropriate face.
The author marked this model as their own original creation.