Using the Bosch GWS18V - 13CN angle grinder is easy. First, make sure you've inserted the CORE18V® battery properly. Then, adjust the auxiliary handle to a comfortable position. Turn on the tool using the slide switch. You can use the lock - on feature for long - term jobs. When grinding, keep a firm grip on the tool and let the spiral bevel gears do the work for smooth power. Remember to use the correct wheel type (Type 1A). As for safety, always wear safety goggles and gloves. The KickBack Control and restart protection are there to keep you safe, but still be careful. If the wheel gets stuck, the tool will shut off automatically. When you're done, switch off the tool and wait for the wheel to stop completely. To maintain the grinder, clean it regularly with a dry cloth. Check the gears and the battery contacts for any dirt or damage. If you notice any issues, it's best to get it checked by a professional. And don't forget to keep the battery charged and store it in a cool, dry place.