Using an angle grinder is a task that requires a high degree of attention to safety. The following are some of the things that require special attention when using an angle grinder:

1. Wear personal protective equipment: When using an angle grinder, always wear appropriate personal protective equipment, including safety glasses, earplugs, gloves, and tight-fitting clothing. This equipment can effectively protect you from flying metal fragments, dust and noise.

2. Check the condition of the equipment: Before using the angle grinder, be sure to check the appearance of the grinder and whether the parts are intact. Pay particular attention to any cracks or damage to the grinding wheels to ensure that there are no accidents during its operation.

3. Determine the work area: When using the angle grinder, make sure the work area is dry and well ventilated. Avoid using the angle grinder in a humid environment to prevent water vapor from affecting the safety of the tool.

4. Firmly fix the workpiece: Before cutting or grinding the workpiece, make sure the workpiece is firmly fixed on the table or other support to prevent the workpiece from moving or vibrating during operation, which may lead to accidental injury.

5. Guards and start-up checks: Make sure that proper guards are installed on the angle grinder and that they are adjusted to the proper position before starting. Also, before starting the angle grinder, make sure that the grinding wheel does not touch the workpiece to avoid injuries caused by accidental startup.

6. Maintain the equipment: Inspect and maintain the angle grinder regularly, including cleaning and lubricating the moving parts of the equipment. Make sure that the power cord and plug are not damaged, and pay attention to avoid pulling the power cord when storing the equipment.

In summary, the use of angle grinder should always maintain a high degree of vigilance and strict compliance with safety regulations, so as to avoid potential hazards and accidents, to ensure the safety and effectiveness of the operation.