Tiedown Engineering - Danforth Hi-Tensile Anchor - 20 lb. - 94021. Danforth Hi-Tensile Anchors are 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.. Features:. Model - 20H. Weight - 20 lb.. Holding Power - 2,500 lb.. Boat Size - Up to 50'. Size - 35" x 26.75" x 19"