Bankers Box PRESTO Heavy-Duty Storage Boxes, Instant Assembly, Lift-Off Lid, Letter, Case of 12, (0063101) Instant assembly - just push corners together and the box is ready for use Heavy duty for stacking, storage and transport you can trust Reinforced tear-resisant hand holes make box comfortable to carry Deep, locking lift-off lid stays in place for secure file storage Letter size, maximum strength