Fortress Guardian G-37 Anchor - 18LB [G-37]Guardian G 37 Anchor 18lb Guardian anchors benefit from years of Fortress research and development, offering excellent quality, performance, and economy. These anchors are manufactured from the same corrosion resistant, high tensile aluminum magnesium alloy as Fortress, which makes them stronger and lighter than competitive steel anchors. With Guardian anchors, several Fortress machining steps and extra features, such as anodizing and adjustable fluke