This is one of the most effective squirrel proof feeders we have. Squirrels will hang from the top of the tube and stretch down as far as they can – but there are no feeding ports in the tube. So, they have to drop to the ring that will cover the bottom feeding ports as soon as he lands on the ring!. We have sold a large number of these bird feeders and have yet to hear from a customer that the squirrels beat it – many come to tell us IT WORKS!! Use sunflower hearts in this feeder and hang it anywhere – the squirrel can’t beat it.