A very simple small tap holder I created for some M2 and M3 taps I picked up from eBay. The traditional T-handle tap holders are too much for simple plastic threading and holding these small taps by themselves is a chore. This unit features an M2 screw hole and M2.5 nut captive to secure the tap in place. I have included the FreeCAD file so you can modify it to fit other tap sizes, some minor drilling may be needed to get the tap to fit properly but a snug fit is good. Having an M2 screw that slightly sticks out is good as it helps keep the holder from rolling around. I would suggest an M2 X 8mm.