DR. SLICK 6" WHIP FINISHER Super-extended length allows you to put a whip finish anywhere on the hook-shank (all the way to the hook bend if needed). And the giant thread "triangle" created with the tool will tye the knot over the top of the bulkiest deer hair heads, etc if you wanted to add rubber legs to the back 1/2 of the fly after the front's finished. Very useful, needed tool.