EZ Marine anchor line sets are the perfect anchor rope. Designed to work with EZ Marine Anchor pullers. The 3/8″ solid nylon mainline is the best diameter for ease of use and minimum drag. The 3/8″ MFP (Multi-Filament Polypropylene) is a floating “Tag” line attached to the 3/8″ Nylon main. This keeps the puller from inadvertently floating off the anchor line. It also floats, making it easy to retie to your buoy.