The Yankee Blocker is a smaller option in the Yankee Family of squirrel-proof bird feeders. If a squirrel tries to feed on any of the 6 spring-loaded perches, the Yankee Blocker’s integrated design blocks every port simultaneously, stopping squirrels right in their tracks. 6 adjustable comfort perches provide bird selectivity, and their durable, round design attract a wide variety bird species. The weather guard will reliably protect the seed and birds from the elements. It’s also an effective squirrel guard that blocks squirrels from accessing the feeder from the top and reaching the food. Adjustable weight springs are easily accessible on the base to change weights of closure mechanism to keep out larger “bully” birds like Grackles, Doves, and Blackbirds - simply adjust the central tension spring post to feed the birds of your choice! The Yankee Blocker disassembles into 3 simple sections for thorough cleaning as easy as 1, 2, 3! Backed by Droll Yankees Lifetime Warranty Against Squirrel Damage. Proudly made in the USA.