With the Dewalt D25303DH-XJ dust extraction system, you drill cleanly and efficiently without the hassle of external hoses. Designed specifically for the Dewalt DCH273 and DCH274 18V SDS-Plus rotary hammers, this unit attaches quickly without tools. Powered by an independent built-in motor, it maintains full drilling performance while the washable hepa filter captures 99.5% of fine dust particles. The 2-second power-off delay ensures that any remaining debris in the nozzle is completely cleared. This lets you protect your health during overhead drilling and significantly reduces post-drilling cleanup time on the job site.