The DEWALT Tough System allows any professional to build the storage option that fits their needs. Technicians, electricians and contractors can all use different combinations, eliminating the need for multiple storage boxes spread throughout the jobsite or workshop. This system offers contractors a means of organizing, sorting and transporting their tools and materials from one jobsite to the next. Tough System units can be stacked and locked together or the can be attached to the L-Carrier (DWST08210) for easy transport. The DWST08203 medium case is sized perfectly for larger power tools, and also includes a deep removable tray designed to fit a cordless tool battery and charger. It also features an integrated water seal for tool and material protection from rain, snow and other weather elements. A central locking mechanism allows the stand-alone storage cases to securely attach to the carrier for easy transport.