Makita 198982-9 Dust Case with HEPA FilterMakita 198982 9 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