Is there anyone familiar with the products called “Limber” and “DUIK”?

DUIK

LIMBER

Those products are essential tools for rigging that everyone is familiar with... In DUIK, you can plant bones in the image you create,

but, in LIMBER, it is impossible to plant a bone in the image I created, and do I have to use only the taper section originally given in the tool?

I wonder if what I know is correct.