renzetti version of the turkey skewer
Frank Matarelli made one similar, I've also seen one that used the straight end as a half hitch tool rather than bodkin. I don't like the big glob spinner that most guys apparently do or the loose handle that some tools have. A single hook or loop lets the twist be tighter at the end and thus the tool can't fall off; with the two point tool I would make the loop longer than the dubbed part so that the thread can bind to the tool or use pliers to hold and wind as suggested.
Those Dubbit tools are sold at most suppliers.