It is a 100% functional and reliable pre-tip lead "back lead", which is used to sink the line below the surface in front of the tip of the rod. As a result, the line runs along the bottom and does not scare the fish. Also, thanks to it, boats, floating dirt and / or fish that you fight on another rod do not get entangled in the line on the surface. A special surface treatment helps longevity. The dark green color of the surface is suitable for most types of bottoms in all waters where you will fish with them!