This does not fit a 1" pole! Beware! Its center hole has a diameter of 7/8" [clearly printed on box], and so obviously can't fit a pole larger in diameter than that! It will not fit a Wild Birds Unlimited 1" pole [as I found out the hard way]. Obviously, Droll Yankees want to limit their customers to using their [less sturdy/stable] pole only - a pity. This product is going back.