The 3M Adjustable In Line Document Holder with Elastic Line Guide places documents in line with your monitor and keyboard reducing movement of eyes, neck and shoulders minimizing strain and increasing comfort. The stable weighted base allows ledge to dip below the desk edge increasing desk space. Elastic line guide marks you place, keeps pages open and stretches to accommodate even the thickest books. Supports books, catalogs and just about any size document. Angle and height adjust to suit your needs.