This machine is designed for military, federal, state or local governments as well as Department of Defense contractors engaged in projects where National Security is an issue. The DAHLE CleanTEC® is the World's only shredder with a fine dust filtration system. This integrated system collects fine dust particles created around the cutting cylinders, and forces them into a specialized filter on the back of each machine. This DAHLE CleanTEC® filter permanently traps up to 98% of the fine dust, and provides a cleaner, healthier work environment.