Using the DeWalt DCK265D2 Combo Kit is a breeze. First, charge the 20V MAX* 2.0 Ah batteries fully using the included charger. For the DCF630 Brushless Drywall Screwgun, select the appropriate mode with the top - mounted electronic mode selector according to your drywall hanging task. You can use the high - speed mode for quick jobs and the low - speed mode for more precise work. When using the DCE555 Drywall Cut - Out Tool, adjust the depth guide to get the right cutting depth. You can change the bits easily without a wrench. Keep in mind, always wear safety goggles when operating these tools. For maintenance, after each use, wipe down the tools with a clean cloth to remove dust and debris. Store the tools in the included kitbag in a dry place. Check the batteries regularly and charge them when the 3 - LED Fuel Gauge System shows a low charge. If you notice any issues with the tools, stop using them immediately and contact DeWalt customer support.