After looking around at different Dremel bit holders none of them worked the way I liked, I have bits with various shaft thicknesses and most designs are either too tight for some or too loose to fit all.
This design can accommodate a range of bit sizes from approximately 3mm~4mm diameter and holds them well.
This also comes with ceramic solder iron bit holders and a optional tray for miscellaneous items.
It is recommended to print the fitment tester first ()