Gridfinity 2x2x3 sorting tray

This is a simple 2x2 gridfinity small part sorting tray - it is setup so it can be stored in a gridfinity system. 

I personally use it in a Gridfinity Storage Box by Pred, which I used to store all the small size metrics nuts and bolts. 

There is a bit bridging involved, but should not be anything difficult to print. If your printer can print gridfinity box it should be able to handle those bridging on the holes.