Multipart sewing kit which is meant to hold sewing bobbins. I am not sure if sewing bobbins are universal, but it fits the ones I use.
There is a small hollow pillar, with room for a needle inside, that is meant to hold the bobbins, it has a nut that holds the bobbins in place, as well as the needle.
The outer shell unscrews into 3 parts and is meant to house the pillar. Unscrew the bottom to get to the bobbins. Unscrewing the top reveals 6 small hollow tubes, meant to house sewing needles.
I printed it on an Ender 3 using PLA. I printed all models facing up without supports. I did not need to tune my settings to succeed, but do notice that the needles are stored in very narrow tubes, so if your printer has issues with overhangs take this into account.
I added the FCStd files, I used Ondsel to design it so I am not sure if it opens correctly in FreeCAD. Please keep in mind this is my first 3D design ever and I have not cleaned the files (yet) so they are a big, unannotated, mess. Feel free to inspect it and adjust it to your needs.
Licence: CC-BY-NC-SA