SeaDog 314272 Cast Iron River Anchor, Black Vinyl Coated, 13 lbs.Designed specifically for river currents and heavy drift conditions, river anchors are ideal for pontoon and bass boats. The grappling action of the anchors three individual blades offers effective holding power for rivers and mud bottom lakes, even on windy days. The flow through holes between the blades facilitate easy retrieval. One piece cast iron construction.