It's not the weight that matters - it's the size.
Stronger, better and less than half the weight.
Modern anchor design, using modern materials, and modern anchoring techniques together offer massive holding power that average 200 times the weight of the anchor in real-world empirical testing. Significantly better than the equivalent-sized steel anchors.
Fortress anchors are precision-machined from a high-tensile, corrosion-resistant, aluminium-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.
In US Navy tests, not only did the Fortress anchors out-perform much heavier steel anchors, they were also able to withstand pull loads that averaged over 200x their own weight ... and without incurring serious damage to the anchors, which was noted in the test report summary:
'The fact that the Fortress anchors incurred no significant structural damage at such high holding ratios suggests that the anchors have been extensively engineered from both the hydrodynamic and structural standpoints.'
Fortress anchors let you choose between two shank / fluke angles to provide outstanding holding power in common sea bottoms - a 32°. angle for sand, mud or clay, or a 45°. angle for soft mud.
Fortress anchors can be quickly disassembled for compact storage as a spare or storm anchor.
Fortress Anchors dispel many myths about anchoring: 'the heavier the better', 'steel is strongest', 'just chuck it overboard, she'll be right', 'all anchors do the same job'. Busted. Anchor design and correct deployment are far more important then weight. Many alloys are not only stronger than the equivalent weight of steel, they are more corrosion-resistant too. Your anchor is part of an anchoring system: anchor, chain, rope, shackles and deck-gear. It is protecting a highly-valuable boat - your boat - and it is no place to economise on strength and engineering.
There's a size for every boat. Use this chart to determine which ones are right for you.