Modular tool storage systems consist of components such as tool boxes, organizers, and totes that stack and interlock to form a single mobile unit. They bring together tools and supplies to reduce the number of trips to and from the jobsite. The base component is a wheeled carrier or rolling tool box that eases transport between locations. Components can be added to or removed from the base to customize the system. They are not interchangeable between different system brands and models. DEWALT TSTAK handles most tool storage and transport needs, especially when working indoors or in dry weather. DEWALT Tough System offers a wide variety of weather-resistant components. Milwaukee PACKOUT has multiple configuration options and offers a mix of weather-resistant hard- and soft-sided cases.