Klein MODbox consists of modular components such as tool boxes, organizers, and totes that stack and interlock to form a single mobile unit. The MODbox system gathers and organizes tools and supplies to reduce the number of trips needed to and from the jobsite. The base of the system is a rolling tool box or utility cart that eases transport between locations. Components can be added to or removed from the base to customize the system. They are only interchangeable within the Klein MODbox system.