Fortress Marine Anchors -
Fortress Marine Anchors are precision-machined from a hardened aluminum alloy that is as strong as steel, but with only half the weight. In addition to being stronger and lighter than steel anchors, the aluminum Fortress Anchors have sharp edges which allow them to set faster and penetrate deeper into common sea bottoms for incredible holding power. The Fortress also features an adjustable 32° to 45° fluke angle which helps increase holding power in problem soft mud bottoms. Chain not included.
In test after test conducted around the world, no anchor has set faster or has matched the holding power of Fortress! The Fortress is the best fluke-type anchor we have ever tested.
— Pontoon & Deck Boat Magazine, July 2002.