Hi thanks for the question. I bought it directly from banks. The tube fits over the post, and then the feeder sits on top. It helps to keep varmints from climbing up the post. Here is the link. banksoutdoors.com/product/feeder-sleeve/
No. They'll will rub on the poll and knock feed on the ground. It holds pretty steady though. We put hog panels up to keep them out. Thanks for watching.
