Danforth H500 Hi-Tensile Anchor Danforth Hi-Tensile Anchors are boat anchors engineered to deliver maximum holding power and quick deep bottom penetration. Crafted with high-grade 4130 steel, each shank is heat-treated for exceptional strength while the hot-dip galvanized coating ensures long-lasting protection against corrosion. Weighing just 5 lbs., these boat anchors offer impressive holding power of 1000 lbs., making them reliable and efficient. Suitable for boat lengths ranging from 0 to 31