Greenfield Products Coated River Anchor - BlueThe Tri-Fluke design of the River Anchor allows the flukes to penetrate the river bottom in soft and moderate conditions, or to engage rocks and structure in rivers and current. The River Anchor is a great all purpose anchor for lighter craft, or a great second anchor. Larger models are preferred choice for pontoon boats and other difficult to hold boats.Features: Tri-fluke design recommended in soft/moderate conditions; PVC coated anchor; Recommended chain: 1/4" x 4'; Specifications: Item Number Working Weight Recommended Boat Size (Winds up to 30 knots)Recommended Chain SizeScope 516-R 15-16 lbs. < 18 feet1/4" x 4'5:1 520-R 19-20 lbs. < 24 feet1/4" x 4'5:1 530-R 29-30 lbs. < 26 feet1/4" x 4'5:1