Multi-purpose: suitable for lots of paper, envelopes of different sizes, documents, books, magazines, etc. Neat Desk Organizer: Large sizes don't take up much space, but do a great job of keeping your desk tidy. Flexible Shelves: Four shelves are available and you can insert them into the 8 provided slots as needed, giving you the flexibility to choose the height of the shelves.Flexible Shelves: Four shelves are available and you can insert them into the 8 provided slots as needed, giving you the flexibility to choose the height of the shelves. Easy to assemble: Easy to assemble, all holes are well aligned and can be built easily and happily using the included sturdy rubber bands. Convenient to take anywhere: Next to your laptop, office supplies and visible needs are within reach.