Using the DeWalt DWE43231VS grinder is easy. First, attach the side handle for better control. Make sure to put on the 5-inch type 27 guard to protect yourself from debris. When you're ready to start, use the slide switch to turn it on and adjust the variable speed according to your needs. Remember, the maximum RPM is 10500, so don't exceed this limit. As for safety, always wear safety goggles and gloves. The grinder has a kickback brake and E - CLUTCH® to protect you, but it's still important to be cautious. When you're done using it, turn it off and unplug it. Keep the grinder clean by wiping it down after each use. You don't have to worry about brush replacements because of the brushless motor, but it's a good idea to have it serviced according to the 1 - year free service contract. If you have any issues within the first 90 days, you can get your money back. And it comes with a 3 - year limited warranty for peace of mind.