Metal.Adjustable Expandable Bookends - This bookends designed for practicality and durability with three vertical compartments. Retractable length from 3.9 to 17.7 to meet various requirements.Desk File Magazine Organizer - Our standing organizer is perfect for holding up books,magazines, dvds,hardbacks, games, comic books, catalogues, text books, binders, cookbooks, reference books, albums, and more .Heavy Duty Bookends - File storage holder is made of high quality sturdy and durable metal that stands up to daily wear and tear, not easy deformation,which makes your file holder frame very steady and durable.Unique Design Bookends - Each of our bookends is equipped with a pen holder, you could storage the pen, pencil, scissors and quick convenient access to your documents, magazines, file folders.Space Saving - This Book stand can be stretched from 3.9 to 17.7 to meet your needs, takes less space than traditional bookends. Perfect for storing books away neatly on a desk or shelf.