Fortress Marine Guardian Anchor The Fortress Guardian Anchor provides excellent quality and reliable performance, but at a more affordable price. Made from the same high tensile, corrosion-resistant aluminum magnesium alloy and manufacturing precision as Fortress top-of-the-line anchors, the Guardian has smaller extrusion profiles yet its efficacy is a competitive yet more affordable alternative to heavier, rust-prone steel anchors. Fortress Guardian aluminum anchors feature mud palms which are