Danforth 5lb Hi-Tensile Anchor. The Hi-Tensile is Danforth's toughest, most durable anchor and features very high holding power. The flukes are fabricated for additional strength and then beveled to allow quick, deep bottom penetration. Each shank is made for drop forged steel. Hot dipped galvanized finish. Holding power is 1000lbs. Boats up to 31ft.