In test after test conducted around the world, no anchor has set faster or has matched the holding power of Fortress. Fortress anchors are manufactured from a hardened Aluminium Magnesium Alloy, making them stronger and lighter than competitive steel Anchors. It is the only anchor that is type approved by the American Bureau of Shipping (ABS). A range of sizes for boats up to 150 feet (46 metres). Lifetime Parts Replacement Warranty. Adjustable fluke angle for soft mud. Disassembles for easy storage. Rust proof and non-magnetic. Tough anodised finish. No welds to fail.