Using your Milwaukee 2663-20 impact wrench is easy. First, make sure it's charged if you're using a battery. Then, use the 1/2” anvil with the friction ring to quickly attach a socket with one hand. Hold the wrench firmly and start it up to use the power for fastening or nut-busting. Remember to wear safety goggles when using it. When not in use, store it in a dry place. For maintenance, keep the tool clean by wiping it down after each use. Check the battery regularly and replace it if it's not holding a charge well. Also, inspect the anvil and friction ring for any signs of wear and tear and replace them if needed.