Organize your books and media with ease using this expandable metallic bookshelf, made from thickened steel plate for enhanced durability and stability. the telescopic design allows you to adjust the size, ensuring it fits perfectly into your bookshelf while providing enough storage for books, magazines, dvds, recipes, and more. the sturdy structure ensures that even when you take a book out, the rest of your collection remains stable. it also includes a magnetic pen holder made from pp plastic for convenient storage of pens, rulers, and writing instruments.