Using your DeWalt 20V XR angle grinder is straightforward. First, make sure you've got a fully - charged high - capacity XR® battery. Attach the appropriate grinding wheel according to your task. When you're ready to start, simply press the trigger switch. But remember, always wear safety gear like goggles and gloves. If there's a power outage or the grinder shuts down unexpectedly, you'll need to cycle the trigger switch to restart it. In case the grinder experiences a pinch, stall, or bind - up, the built - in kickback brake will stop the wheel quickly. Also, the E - Clutch system will automatically shut down the motor in a flash to protect it. After each use, clean the grinder with a dry cloth. Store it in a dry place to prevent rust and damage. Regularly check the grinding wheel for wear and tear, and replace it when necessary. This way, your grinder will serve you well for a long time.