The Milwaukee M18 HAMMERVAC Dust Extractor has an optimal in-line design and utilizes the autopulse filter cleaning mechanism, which triggers automatically after use - to clean dust from the extractor filter. This item includes large and small dust nozzles, a translucent dust box, and a vacuum port, which works to minimize exposure when emptying. This piece of equipment can be used with 2915-20 M18 Fuel 1-1/8" SDS rotary hammer w/ one-key.