Rugged polyethylene indexes are wear- and tear-resistant Fasteners can hold 2 inch thick stacks of paperwork securely inside the classification folders for instant flip-through. Office Depot classification file folders help you subdivide and identify various sections of your documentation. Dividers are made of 17-pt. kraft for amazing durability. Thick and durable 25-pt. pressboard covers. Tyvek tape spine expands to hold plenty of documents.