Erupt Fishing is all about bringing innovative products to America's favorite sport to make it even more enjoyable for all anglers. It's patented RTD (Rod Threading Device) solves the usual headaches associated with threading line through rod guides. The line attaches to the bobbin with a simple tug and then the RTD self-centers itself to feed the line through each guide as it is advanced by hand up or down the rod. Fast and easy to use, RTD works with most traditional rod types, and also works awesome on fly rods.The unit's compact size fits easily into tackle box trays.