This is a screw down wire hanger, harness, clip. Though it is two pieces, it is already fully assembled and can be printed in one go. It is designed to require minimal supports provided you lay it on its side as shown in the screenshot from my slicer (IdeaMaker).

Once printed, remove to two little supports and the clip hinges open quite easily.

The screw hole is designed for a 6 x 1 inch (or longer) deck screw (as shown in the photo).

The hole is made large enough for standard house wire.

I made this because I hate the really poorly-made nail in ones that basically guarantee you'll whack your fingers. It's also great for existing wire you want to get control of. Fits into small places easily.

TEVO

Tornado

Doesn't Matter

Yes

Fine

High

Print it on its side so the hinge doesn't require supports. I printed it with very fine resolution and high infill so the hing doesn't break and the whole clip is less likely to split apart if you push the screw in too far.rnrn