Using the DeWalt DWE43066 is easy. First, make sure to attach the appropriate guard for the task you're doing. Then, plug in the corded power tool. You can use the trigger switch to start and stop the grinder. The lock - on switch is handy for continuous use. When using it for metal cutting, keep a steady hand and let the tool do the work at its 9,000 RPM. As for safety, always wear proper protective gear like goggles and gloves. Avoid using the tool in wet conditions. If the wheel pinches or stalls, the e - clutch® will shut it off, which is a great safety feature. For maintenance, regularly check the dust ejection system to make sure it's working properly. Clean any dust and debris from the tool after use. This will help keep the gears and motor in good shape and extend the life of your grinder.