Fortress Marine Anchors - Fortress FX-16 (10 lbs Anchor / 33-38' Boats) The Fortress Anchor Advantage: A hardened High-Tech, rustproof aluminum-magnesium alloy anchor. For boats of 33-38’ feet, Fortress FX-16 Anchor has superior holding power at a fraction of the weight . Easily assembles and disassembles for convenient storage. Highest rating in over 20 independent tests worldwide. Over 1 million+ people have joined the Fortress Marine Anchor family. FORTRESS ANCHORS: offers a 100% Hassle-Free Lifetime Warranty, and a product made in the USA. FORTRESS ANCHORS: provides a product tested and used by the U.S Navy and U.S Coast Guard. MODEL NO - FX-16