Using your Milwaukee M12™ drill driver is easy. First, make sure the battery is properly inserted. To change bits, use the quick - loading 1/4 in. hex chuck with one hand. When you start working, use the variable speed trigger to control how much power you need. The built - in LED will light up dark spots for you. As for the clutch settings, adjust them according to the material you're working on. When it comes to safety, always wear appropriate safety gear like goggles. Avoid using the tool in wet conditions. For maintenance, after each use, wipe the tool clean with a dry cloth. Check the battery regularly and store it in a cool, dry place. If there are any issues, take it to an authorized service center.