Geometric cubes that stand alone or interlock to build user-defined storage space, creating the ultimate answer to your organizational needs. Single and double mobile bases put the cubes in motion allowing you to create your own unique storage and filing system. Multiple interlocking cube arrangements are perfect alternatives to lateral files or bookcases. 5/8" thick panels are fully finished on all surfaces. PVC-edge banding on all exposed ends for ultimate durability. Quick-lock fasteners make assembly easy. All cubes interlock top to bottom and side to side.