Using the Milwaukee 2615 - 20 M18 Cordless Right Angle Drill Driver is straightforward. First, make sure to attach the appropriate drill bit to the 3/8 - inch Single Sleeve Keyless Chuck. Then, select the desired torque setting on the Electronic Clutch according to your task. The extended multi - position trigger allows you to hold the drill comfortably from different angles. When working in low - light areas, the built - in LED lights will help you see the work surface clearly. As for maintenance, after each use, wipe down the drill with a clean, dry cloth to remove any dust or debris. Store it in a cool, dry place. Avoid dropping the drill or exposing it to extreme temperatures. If you notice any issues with the drill, such as abnormal noise or reduced performance, stop using it immediately and have it checked by a professional.