Adjustable Feature of Bookends: One-piece structure with adjustable bookends, featuring a maximum length of 50 cm (19.6 in) and a minimum length of 15 cm (5.9 in). You can freely adjust the length according to the thickness and quantity of your books or folders.Separate Design of Bookends: Bookends for book shelves are divided into three compartments, suitable for organizing different categories of books and files. These bookends securely hold books in place, functioning as a stopper for magazines, DVDs, encyclopedias, binders, family albums, cookbooks, reference books, and more. The design allows for easy access, making it convenient to remove or return books.Desk Organizer Function: Adjustable bookends help organize your desk efficiently. They are ideal for keeping books and folders neatly arranged, saving space for other tasks or items. These bookends are also suitable for use on bookcases, bedside tables, in schools, libraries, or any area where organization is needed.Great Gift Choice: Constructed from high-quality metal with reinforced rivets, these bookends are durable and built for long-term use. A thoughtful gift for book lovers, readers, or anyone who values a tidy workspace.Usage Tips: For optimal performance, adjust the bookends to fit the size of your book collection and fill the space as much as possible. If storing only a few books, place additional items on both sides of the bookends to enhance stability. Refer to the adjustment instructions (shown in the last product detail image on the left) to learn how to properly adjust the length.