Clamp-on Corner 17” Dual Shelf: Create extra storage space on or below your desktop with these modern clamp-on shelves. The clamps secure to both sides of a 90-degree angle for an attractive corner desk attachmentStorage Solution: Solid 16.9” x 10.2” shelves are for storing gaming devices,office supplies,notebooks,and more. Also great for displaying photos,decor,plants,etcVersatile Mounting: Assemble mount above the desk as a workspace organizer or below the desk as a hidden under-desk shelf for battery back-ups,power strips,and more. The lower shelf is height-adjustable for additional customizationSimple Installation: Dual C-clamps secure to desktops up to 1.8” thick with simple hand tightening,making installation a breeze without the need for tools or drilling into your table surfaceMoves With Your Desktop: Experience the same access to this clamp-on desk shelf whether you're sitting or standing. for height-adjustable sit-to-stand desks,creating additional storage space to clear the clutter.