Using your DeWalt DWE4557 Angle Grinder is easy. First, make sure to attach the 7 - inch guard properly for your safety. Hold the grinder with the 3 - position side handle in a comfortable grip. When starting the tool, keep it steady and let the high - power motor reach its 8,500 rpm speed. You can use it for various grinding and cutting tasks. Remember to wear safety goggles and gloves. As for maintenance, thanks to the Dust Ejection System™, the motor is protected from dust. But it's still a good idea to clean the grinder regularly. When the automatic turn - off brushes stop the tool, it's time to replace them. Always store the grinder in a dry place to prevent damage.