The Dust Extractor Case with HEPA Filter (model 198982-9) is the replacement dust case for the Makita Dust Extractor Attachment (model 135905-6, used with Makita 1" Rotary Hammers, models HR2661 and HR2651, all rotary hammers sold separately). The Dust Case includes an efficient HEPA filter engineered to capture 99.97% of dust particles (size .3 microns and larger) for improved dust collection. The high-capacity dust container is clear and provides an accurate level indicator of collected material, and has a quick release and can be easily detached from the dust collection attachment when needed.