The Stanley FatMax 023001W 23″ Structural Foam Tool Box is an extra heavy duty, professional toolbox. It features a water seal which makes the toolbox water resistant to keep tools dry and protected. This toolbox is ideal for carrying power tools, hand tools, and medium-size to large items. The portable half tray allows room for storage of larger items. The V-groove with ruler on top of lid holds materials such as lumber and pipes in place for cutting. Overall storage capacity of 5.8 gallons.