Suitable for any outdoor job or project, the TRADESTACK™ 22 in. Rolling Tower Premium Storage Stack includes a suitcase, deep toolbox, and a rolling unit. The TRADESTACK™ units connect to each other, automatically stacking via a drop and lock mechanism and easily separating with a one-touch release. They are IP65 dust and water resistant, have a large storage space to fit large and heavy tools, and feature durable 7 in. wheels that enable smooth mobility for convenient transport to any destination. Compatible with VERSATRACK™ modules, and CRAFTSMAN® organizers and tool sets via an included adaptor, you will be ready to meet all your stackable storage needs.