I was looking for a bit holder to hold a few bits that were loose in my tool box drawer. I couldn't find one that was right, so I drew one up. The bits do not fit sung in the holes but they are deep enough that they will not fall out when you open the tool drawer on your tool box.  

I printed this model with 3dxtech ecomax pla. 10% lightning infill and it seemed to print fine. There is no need for supports.  

160mm x 92mm x 20mm hex bit tray. Holds 72 hex bits and has a 59mm x 85mm x 18mm catch all bin.