Nature's Way Squirrel Shield Choice Tube FeederDefend your bird seed from undesirable critters with multiple squirrel stopping features! Squirrel resistant weight sensitive seed shield collapses under squirrels weight to block seed port access Quick locking roof secures top of feeder with a simple turn Push toggle roof provides easy access for refilling while hanging and doubles as a secondary defense to keep squirrels out Easy clean base design allows for thorough cleaning by simply depressing