The Danik anchor hook attaches easily to your anchor and allows adjustment to any water depth without ever tying a knot. Just hold the lever down, and the anchor line slides freely. When released, the anchor hook firmly grips the line at the desired position. Made of 100% marine stainless steel. The Danik Hook is tested to hold up to 8,000 lbs. Features an integrated ring for a buoy line. For use with 3/8" - 5/8" dia. anchor line.