Using your Milwaukee 2912-DE Dust Extractor is easy. First, connect it directly to your M18 FUEL™ 1-inch SDS Plus Rotary Hammer (either 2912-20 or 2914-20). The built - in adjustable depth stop and ruler will help you make accurate drilling adjustments. When you start drilling, the extractor will collect the dust. After each use, the AUTOPULSE™ Filter Cleaning Mechanism will automatically clean the filter, so you don't have to worry about it too much. To empty the dust box, instead of dumping the dust, use a large vacuum or another dust extractor through the vacuum port on the dust box. This way, you'll reduce your exposure to dust. When it comes to maintenance, check the HEPA filter regularly. Replace it when it's too dirty or damaged, as it's crucial for the extractor's performance and meeting the high - efficiency dust - filtering standard. Also, keep the extractor clean and store it in a dry place when not in use.