One holds 3/8" sockets, 9 of them. The other holds 1/4" sockets, also 9. I needed some. I started with the SolidWorks file of one designed and uploaded by dnug80. I made some changes.
I also needed a 10 x 1/4" so I added that. Then I shortened the prongs on the 1/4" versions as I found the 1/4" receiver was not as deep on some sockets.
I test fit each socket as I place them. I often need to cut down the nubby bit. I will keep working on that part, but it definitely depends on how well your printer is tuned.