I was looking for something to hold my Wiha 5 piece hex driver set (https://www.amazon.com/gp/product/B000NZ5QE2) and I wanted something that would stand up and be stable.  I saw a few, but none that matched exactly what I was looking for.

I printed mine in ASA with .3 layer height (mostly to test my new Voron V0.2).  

The drivers go in at an angle and snap into place.  They are intentionally a tight fit so they stay even if you drop it.