This is an alternate holder insert for a Dewalt 50-piece 1/4 in. Drive SAE and Metric Mechanics Tool Set.

This set is sorely missing what is arguably the most useful addition .. an impact driver socket adapter.  But it has 22 driver bits, most of which are near impossible to remove by hand.  What nut grabs a socket set without a screw driver anyway?

This insert adds a place for that impact driver adapter, and still gives you 8 driver bits.  I modeled this to accept the ¼' Makita Impact driver socket adapter.  It should work for others that have an 8mm diameter shaft for the clip.

Overall length x width:  3-5/8" x ¾" (92mm x 19mm)

I include STEP and Fusion 360 design files for easy remixing.

Features:

• Strong two part design, with layer lines in optimal direction.  They snap tightly together.

• Easy print - no supports needed.

• Adapter seats snuggly with a satisfying click.

• Recessed area for fingers to remove the adapter.

• Driver bits do not come loose upside down.  The slots for them won't bind and contain a tiny nub for a nice friction fit.  Not loose, but not impossibly tight either like the stock driver holder.

Printing instructions:

• PLA works great (I printed with matte black)

• Print main part on its base, print the clip on its side

• Print with 3 wall loops, and wall generator: arachne …

• … or just use my 3MF file