This is a modular Hex Bit holder, which displays the hex bits at an angle easy for viewing and use.

It's modular in that each one can hold 10 bits, but dovetail slides into one right next to it, so you can string together as many as you want to hold those 1000's of hex bits. It also allows you to remove a few at a time as you are hunting for the right size bit away from your workbench.

This is best printed with PETG and printed with the bottom of base on the print bed as you would use it normally.

Slicer Settings. I usually infill the "Base" portion at 5% to save print time, but I make sure to infill the male dovetail sections at 50% for strength.