DWH304DH DEWALT Onboard Rotary Hammer Dust Extractor for 1-Inch SDS Plus Hammers (DWH303DH) About this item The dust extractor features Table 1-compliant dust management solution for 1-1/8-inch SDS Plus rotary hammers 2-second power off delay of the DEWALT dust extractor ensures dust extraction to continue after drill is switched off Clear, durable dust box ensures users can see when dust box needs to be emptied Built-in motor increases suction and high tool performance Replaceable dust nozzle to quickly change to new nozzle Drill up to 5/8-inch diameter, 4-inch useable length, 6-inch overall length bits Fits into tight spaces on scissor lifts and between overhead pipes and duct work Easily adjustable depth guage for accurate anchor drilling