This OSHA Table 1-compliant dust extractor works with the cordless dch293 and the corded d25333 1-1/8 in. Rotary hammers. It features an OSHA 1926.1153-compliant dust box assembly. With a filter cleaning mechanism and a HEPA filter, it removes 99.97% of airborne particles 0.3 microns or greater. This dust extractor has a powerful fan assembly for increased suction during high-performance drilling. It allows users to drill up to 1 in. Diameter, to depths up to 10 in. Install large diameter sl