Effective over any hanging Droll Yankees feeder. It features a brass rod - beautiful and durable dome that acts as a rain guard. Also has collet technology, which means you can adjust the dome position on brass rod. Articulating design - weight of a squirrel displaces feeder hung beneath. UV stabilized polycarbonate dome - prevents yellowing. 15" dome protects seed from weather and thwarts squirrels. Safety-lock hook secures feeder. Also available in pole mounted version.