Adds all new dimensions of what is possible with a dubbing loop. Tye traditional loops using any material with the greatest of ease, but it will also allow you to incorporate wire, hackle, peacock herl, flash materials like Krystal Flash, you name it. The notches in the side allow any of these material that are previously tyed to the hook shank to be attached to the Multiloop Tool after youve preloaded the dubbing loop. VERY COOL. Its hard to grasp in words, go to YouTube and youll find a lot of videos that will simplify its use.