thingiverse
Hear are the files for the 3/8 sockets that I have cut into sections so they will fit on most print beds.
I used these files for mine and they worked great. In order to join them together use super glue and then take a solder iron with a flat end and melt the plastic along the joint. This is what I did and they seem to hold very strong.
Direct link to the original creator's page
Click the "View on thingiverse" button above to visit the original model page on thingiverse. You can download the STL file directly from the creator's page for free.
This STL file is compatible with most FDM 3D printers (Creality Ender 3, Prusa MK3S+, Bambu Lab, etc.) and resin printers (Elegoo, Anycubic). Check the original page for recommended print settings and materials.
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Most STL files can be modified using free software like Blender, TinkerCAD, or Meshmixer. Check the license on the original thingiverse page to see if modifications are permitted by the creator.