Bankers Box® Premium Classic Storage Boxes, are made from FSC® certified 100% recycled and recycled board and are double sided to ensure maximum strength as a heavy duty box. This enables up to six boxes to be stacked on top of each other, saving storage space. Being heavy-duty these boxes are also ideal for frequent use and movement. With Presto™ technology these boxes can be assembled in just one second with PRESTO™ instant assembly, just by pushing the corners together, making these boxes the perfect time saving solution where a large number of boxes are required. These Classic boxes are able to hold Lever Arch Files as well as Ring Binders and Transfer Box Files.