It may well be the most revolutionary invention in Fly-Fishing since the discovery of "oethe hook." This product will eliminate the majority of the lead used in nymphs and wet fly patterns throughout the world if only everyone started using it. Gehrke's XINK(R) is the only patented Fly Sink in the world. Gehrke's XINK(R) is amazing because it is wetter than water without washing off, which was, until invented by George Gehrke, a chemical impossibility.