The Dust Extractor Attachment with HEPA Filter Cleaning Mechanism (KDE20V-16) is for use with the 20V max Rotary Hammer (KRH20V-26, sold separately). The attachment features a HEPA filter engineered to capture 99.97% of dust particles (size .3 microns and larger), with a filter cleaning mechanism for improved dust collection and OSHA Table 1 compliance. The transparent dust container holds up to 357g. It also features a depth stop adjustment that allows for setting the accurate drilling depth. With a quick release, the dust container can be easily detached from the dust collection attachment when needed.