Amazing disappearing shelf turns ordinary books into an ingenious, modern illusion. Simply secure a large hardcover into the shelf bracket then add a stack of books. The bottom book should be the largest in the stack. Two small, hidden rivets hold the hardcover book in place, so the bottom book becomes the shelf. Hang a few of these modern metal bookshelves to create a cool, floating library. Powder coated steel. Installs easily with two screws. Small holds up to 15 lbs.