Using your Milwaukee M18 FUEL Super Sawzall is straightforward. First, make sure you attach a suitable blade using the QUIK - LOK® Blade Clamp. It's toolless, so it's quick and easy. Then, choose the right speed for your task with the variable - speed trigger and 5 - speed dial. For wood, you might want to turn on the orbital action for more aggressive cutting. For metal, turn it off for a smoother cut. When you're not using the saw, hang it on the rafter hook for convenient storage. As for safety, always wear safety goggles and gloves. Keep your hands away from the blade. Avoid using the saw in wet conditions. For maintenance, clean the saw after each use. Check the blade regularly and replace it when it's dull. Also, make sure to charge the M18 battery properly to keep it in good condition. With proper use and care, your saw will last a long time and perform at its best.