The DEWALT D25303DH dust extraction system features a powerful built in motor for increased suction and high performance drilling. The D25303DH connects to the Brushless 20V MAX* DCH273P2 1" rotary hammer with 5.0 Ah batteries or the DCH273B, bare tool. The 2-second power-off delay ensures that dust extraction continues after drill is switched off. The D25303DH features a durable clear high capacity dust box, replaceable dust nozzle, replaceable HEPA Filter, and a quick release for easy attachment and disassembly. The D25303DH benefits the user with the ability to use carbide drill bit diameters up to 5/8", which allows users to drill overhead for 1/2" drop ins.