Erupt Fishing RTD Rod Threading Device Tool - We’ve all had the experience of dropping line while maneuvering it through the multiple guides on a fishing rod, due to the line being hard to see, hard to grab and hard to handle, or just missing guides. The RTD eliminates these issues. The RTD works with most traditional fishing rod guides, casting, spinning, and awesome on fly rods. The RTD threads all types line on fishing rods in mere seconds.