Hi-Tensile Anchors The Danforth Hi-Tensile anchor is our toughest, most durable anchor and features very high holding power. The flukes are fabricated using I-beam construction for an added margin of safety and then beveled to allow quick, deep bottom penetration. Each shank is made from drop forged steel. Hot dipped galvanized finish coating. Because of the weight this item does not qualify for free freight.