This is universal hexbit holder that can be mounted to a wall.
It can hold 20 long bits and it takes less than 40 grams of filament to print it. I wanted bits to stick in tight, but at the same time they should be easily taken out. Such affect is achieved by 2 circles inside the hex hole. I have learned that different bits have different diameters, but I wanted this holder to be universal. So I did a lot of testing before coming to this exact size.
Also holes have no button, so support is not necessary and as a bonus dirt doesn't stay in them.
Take a look at the description picture, to see all design specials.

I recommend to print it upside down, this way you will not need support. I personally use nylon for printing such kind of stuff, but guess any filament will work.

Since it was designed with Tinkercad you can edit it online, so that it fits your needs. https://www.tinkercad.com/things/06HHHlNXb0Z