This GDE18V-26DB15 Bosch 18V SDS-plus Bulldog Mobile Dust Extractor Kit combined with a CORE18V Compact Battery allows users of the Bosch 18V D-handle Bulldog to control dust during drilling applications at the jobsite to achieve maximum mobility plus runtime. The GDE18V-26DB15 Bosch 18V SDS-plus Bulldog Mobile Dust Extractor Kit provides a true cordless solution when used with the 18V 1 In. GBH18V-26D Bulldog rotary hammer. It features a HEPA filter helping users move toward compliance with OSHA silica dust regulations. GDE18V-26DB15 Bosch 18V SDS-plus Bulldog Mobile Dust Extractor Kit is also compatible with the corded 11255VSR GBH2-28L and RH228VC Bulldog rotary hammers. The attachment comes with two Dust-Eye options (one small one large) and a 4 In. extension. The dust canister capacity can accommodate up to 20 holes using a 1 -2 In. diameter bit drilling 2 In. deep into concrete. GDE18V-26DB15 Bosch 18V SDS-plus Bulldog Mobile Dust Extractor Kit features a CORE18V 4.0 Ah Compact Battery which have next-gen Li-ion 21700 cell technology for optimal performance in a lightweight high-power battery. Each GBA18V40 single-layer battery matches the power from the original two-layer 4.0 Ah battery with improved performance per cell.