Milwaukee® designed this accessory dust box for the M12™ HAMMERVAC™ universal dust extractor. The dust box includes a lid and HEPA certified filter. This dust extractor box is designed to be emptied without exposing users or the jobsite to harmful particles with the integrated vacuum port to remove the dust. Milwaukee® Dust Box, Filter and Lid, For Use With: M12™ HAMMERVAC™ 2509-20 Universal Dust Extractor, Black/Red