RIDGID Professional Tool Storage Cart And Organizer Stack includes the lower tool box cart with extended handle and all terrain wheels. The middle box allows for additional storage to more tools and accessories organized. And the upper tool box allows storage of those smaller items. This RIDGID tool box cart is made with a durable high impact resin and made to last. It offers heavy duty metal latches, and an integrated water seal to protect against water and dust damage. All three tool storage boxes are included. The lower box dimensions are 22.2'' wide by 12.2'' deep by 18.3'' high. The middle box in this stack is 22.2'' wide by 12.2'' deep by 13.8'' high. The upper tool box is 22.2'' wide by 12.2'' deep by 6.5'' high.