Don’t bother.  The Metal Ball Finials don’t fit on properly, they give the tiniest screws to tighten them onto the curtain rod, they only slightly work on the one end as the rod is bigger on that end but doesn’t fit at all on the other end. And the curtain rod is the other complaint, as they fit into each other, one is noticeably smaller than the other and it just looks sloppy. Don’t waste your money.