The Bosch GXA3-01L PRO+GUARD™ Drilling Kit features a HEPA filter, fleece filter bag and other accessories to upgrade the VAC090-series dust extractor. The VF130H HEPA Filter captures 99.97% of particles 0.3 microns and larger, and it has a low-stick surface to enhance the filter-cleaning process. It helps users move toward compliance with the OSHA respirable crystalline silica dust regulation.