Choosing an angle grinder is not only about the lowest price. Three parameters decide whether the tool suits your work.

1. Power (Watt)

For light household work 500–700 W is enough. For cutting rebar or continuous grinding on site, use at least 800 W. Underpowered tools overheat and fail sooner.

2. Disc Diameter

• 100 mm — most common, light, good for detail work
• 115 mm — a good compromise
• 180–230 mm — heavy cutting, but heavy and needs two hands

3. RPM

Metal cutting discs are generally safe at 11,000 RPM. Make sure the machine RPM does not exceed the disc maximum — this is the most common cause of disc breakage and injury.