The Klein Tools 54802MB MODbox Rolling Toolbox organizer has 10 in. solid rubber wheels for convenience while on-the-job. The retractable handle is easy to remove for storage in tight spaces. This unit allows users to bring more tools to the jobsite with side rail attachments and back stowage compartments. Users are provided with a stackable tool box that is IP65 rated, has a 250 lb. capacity, and is made with heavy duty impact resistant polymers. The Klein Tools 54802MB easily connects with other MODbox components to make a custom mobile workstation.