Plug a tool into the built-in outlet and this 10-gallon vacuum turns on when the tool is turned on. It also runs 15 seconds after the tool is shut off to clear the hose of any debris. The dual filtration system with a washable automotive-type filter and a two-ply paper filter trap 99.85-percent of fine particles. The corrosion resistant polypropylene tank rolls about on large wheels for easy maneuverability. The 9 amp motor has a flat top surface tray for holding tools while working. Corrosion resistant polypropylene tank Large wheels for easy maneuvering Convenient flat top surface tray for holding tools while working .