Rio Premier Fathom Clean Sweep Sinking Fly LinesSLICKJCAST and WELDED LOOPS INSTALLED on both ends. Built for lake fishing. Short, quick loading head with Clear intermediate front end, faster sinking body section and a slower sinking running line. Results in a deadly fly path through the water, with the line sweeping the depths during a retrieve from the surface, to deep, and back to the surface again. Hang Marker shows anglers when to stop stripping. Sink 2 Sink 4 Intermediate in WF5 WF8, S4 S6 I