Summary

Yet another spool reducer for spools
with a larger inner hole. Good to have
for a spool holder with shorter distance
and spools not fitting there very well.

It has some cuts at the turning sides
providing better grip when tightening
and to loose the screw.

And the inner diameter is good for
spool holder bars having some bigger
maximum diameter (here up to 40mm).

The screw and bolt here should be good
for spool holes with a diameter of
64 to 84 mm (or so) and a spool width
up to 65 mm (or 75 mm longer version).

Have fun!