Dry roller brush

This is a hair dryer roller brush that I bought a while ago but haven't used.
The brush shaft has lots of holes in it.
I bought it thinking it might be good for drying, but...
My hair doesn't wash well with the comb, and
The comb thickness is also awkward for my hair, and
It doesn't really help with drying either, so I don't use it.
I think I should check the reviews carefully before buying a roller brush, too.