Using the DeWalt DCF891Q1 impact wrench is a breeze. First, make sure you've got the right battery charged up and inserted. You can pick from 4 speed settings using the push - button switch and use the variable - speed trigger for more control. When you're working, select the output level based on the job at hand. The Precision Wrench™ setting is handy to avoid overtightening or fastener run - off. The on - tool LED work light can be turned on when you're in a dark place. As for maintenance, keep the tool clean after each use. Wipe it down with a dry cloth. If there's any debris, use compressed air to blow it out. Store the tool in a dry place. And remember, the battery and charger are sold separately, so take good care of them too. Don't overcharge the battery and make sure to follow the charging instructions. This way, your DeWalt DCF891Q1 will serve you well for a long time.
