Bit holder

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 no