5x1 gridfinity holder for networking punchdown tool (for terminating rj45 keystone jacks). 

The original was too short for the cheapo version of this tool that I have. This one fits snug in the main handle and has a little extra room at the blade, but works well enough for me. 

It's difficult to remove the tool without lifting up the printed holder and dumping it out. If I did another revision, I'd add a semicircle finger cutout to the back.