This close up view shows the students' drawings have been mounted to construction paper. The mounted art slips right into the bottom of Casso Display Rail without the need for any fasteners or sharps to hold the art in place. This is achieved through the clever design of this rail that allows for paper and thin-board items, up to 2 mm thick (1/16 inch). Both 2 ply and 4 ply mat board are compatible. The wiper blade style of synthetic polymer ribs let sheets slide effortlessly into place, then keep them in place until the sheet is intentionally removed, again without effort or damage to the item. Another perk to this rail, and the fact that no fasteners are required, is you'll never need to locate a stapler or tacks, making the rail always ready for use. It is best to treat paper organizer Casso Display Rail as any other architectural element. This application was done the right way, with multiple rails placed end to end with no breaks between them, so it creates a very functional, space saving, and visually appealing display.