In test after test, from coast to coast and from around the world, no anchor in history has been called 
"The World's Best Anchor" by more boaters and respected marine experts than Fortress and for good manufacturing, and thousands of real world tests are your assurance of performance, quality and value. Fortress weighs only half as much as heavier steel anchors and yet outperforms them all.
Fortress anchors are precision-machined from a high-tensile, corrosion-resistant, aluminum magnesium alloy, and are sharper and able to penetrate faster and deeper into most common sea bottoms than heavier, dull-edged traditional steel anchors which weigh 50% more or even greater.
The Fortress anchor comes in eight sizes capable of anchoring boats between 16 ft (5 m) and 150 ft (46 m)! Visit their website to view a selection guide and learn which size anchor is right for your boating needs
http://www.fortressanchors.com