Found one of these cheap. Can't figure out how the "Whit Finish" part of the tool would make the final knot faster OR last longer. Basically it uses the same idea and technique as a rod wrap uses. One must cut the thread, then insert in the loop and pull tight. Anyone ever use one? Are they better or just different?

The tool also has a bodkin and a velcro-type dubbing brush.

See it here

Mine has a much shorter loop, and black velcro