Using the Milwaukee 2555P - 20 M12 FUEL Stubby 1/2 Pin Impact Wrench is a breeze. First, make sure the M12 REDLITHIUM battery is fully charged and properly inserted. Then, select the appropriate mode on the 4 - Mode Drive Control according to your task. For precise work, use the 1 - 3 RPM setting. When doing reassembly, the Auto - Shut Off Mode in the 4th setting will help you avoid over - fastening. When using it in tight spaces, take advantage of its compact 4.9' length. As for maintenance, keep the tool clean after each use. Wipe it down with a dry cloth to remove any dirt or debris. Periodically check the POWERSTATE Brushless motor and the REDLINK Intelligence system for any signs of damage. If you notice any issues, contact a professional for repair. Also, store the tool in a dry place to prevent rust and corrosion.