Using the DeWalt DCF891B impact wrench is easy. First, make sure you have a compatible battery (sold separately) and insert it into the tool. When starting a job, choose the appropriate speed setting from the 4-mode push - button switch based on the task at hand. Use the variable speed trigger to control the power precisely. For applications where overtightening or run - off is a concern, switch to the Precision Wrench setting. When working in dark spaces, turn on the on - tool LED work light. Remember, the battery and charger are not included, so you'll need to purchase them separately. To keep your impact wrench in good shape, after each use, wipe it down with a clean, dry cloth. Store it in a cool, dry place. If you notice any issues with the tool's performance, such as a decrease in torque, it might be time to have it checked by a professional.
