Bit holder for JCB cordless power tools

My JCB 20V cordless drill and impact drivers don't have anywhere to store extra bits so I designed these bit holders to fasten to the side using the existing screw where the belt/ladder clip can be mounted.   

One design just holds one bit.  It isn't as compact as the design that holds two bits but makes it easier to insert and remove the bit if constantly swapping between two bits.  The other design holds two bits and is more compact and is useful for storing the bits with the tool when you won't be constantly switching back and forth between them.

I designed these so the bits fit tight. After inserting and removing them a few times they fit nice but still securely.  I printed these in black PLA with 4 perimeters, 4 top and bottom layers with a 0.4 nozzle at 0.16 layer height and it seems really sturdy, so there isn't a need to print this out of PETG or ABS.  See the slicer picture for how I orientated it on the print bed. No supports were needed.

You can see in one of the pictures I re-orientated the single bit holder with the logo facing down so I could print it in two colors, white first then black.