Wilson Jones Sheet Lifters, Durable Easy Flow I, 55 Gauge, Black, (W364-99) PACK OF 20 Sheet Lifters protect your pages in binders; 20 per pack Prevents pages from being trapped under the rings, eliminating wrinkling and curling D-Ring binders: place sheet lifter on top of contents; Round Ring binders: place one sheet lifter on top of contents, place another below contents