Using the Milwaukee M12 FUEL Stubby 1/2 Pin Impact Wrench is straightforward. First, make sure the M12 REDLITHIUM battery is properly installed. When you need to remove or fasten bolts, select the appropriate mode from the 4 - Mode Drive Control. For precise work, use the 1 - 3 RPM setting. When reassembling, the Auto - Shut Off Mode in the 4th setting will help you avoid over - tightening. As for maintenance, keep the tool clean after each use. Wipe it down with a dry cloth. Also, check the battery regularly for proper charge. Avoid using the tool in wet or extremely dusty environments to ensure its long - term performance. If you notice any issues, consult the manufacturer's support.