Using the DeWalt DWAFV8918 is straightforward. First, make sure your FLEXVOLT® cutoff saw (DCS690) is turned off and unplugged. Then, securely attach the cutoff wheel to the saw according to the saw's instructions. When you're ready to cut, wear safety goggles and gloves to protect yourself from metal shavings. Start the saw and gently guide it through the metal at a steady pace. For best results, don't force the cut. As for maintenance, after each use, clean the wheel with a soft brush to remove any metal debris. Check the wheel regularly for signs of wear or damage. If you notice any cracks or excessive wear, replace the wheel immediately. Store the wheel in a dry place to prevent rusting.