I recreated Vincent Chan's excellent hex driver in FreeCad to make it magnetic. I modified the handle model to remove the latch mechanism (which didn't work well for me) and to add a recess for a 6x2mm magnet.
I also recreated the stand in FreeCad to add more bits and I modified the handle holes. My model didn't quite fit the original and I just made them round so I don't have to orient the handle with the hole.
It works great. I printed this in PLA on a budget Longer LK5 Pro, then I bought a set of ball head hex allen drill bits and a set of regular hex allen drill bits, and this is what I used to build my Voron 2.4r2 printer. I printed like 4 different color handles to hold the most used bits and I use this system a lot!
I believe I printed the handles with 5 walls and 25% infill, and the holder with 3 walls and 15 or 20% infill.
The FreeCAD files are available on my GitHub
The author remixed this model.
I recreated the handle model in FreeCAD to remove the latch mechanism (which didn't work well for me) and to add a recess for a 6x2mm magnet.
I also recreated the stand in FreeCAD to add more bits and I modified the handle holes. My model didn't quite fit the original and I just made them round so I don't have to orient the handle with the hole.