With the Makita DGA505ZJ, you can even polish on spots where there is no power supply, because it runs on batteries (not included in this version). Still, you can work just as efficiently with the compact 18-volt angle grinder as you would with a wired model. The automatic speed control ensures that you'll work with exactly the right power for every application. This way, you'll maintain a constant RPM, even under heavy load, such as when polishing stone. You can work safely thanks to the safety switch (or kill switch) that makes sure the grinder immediately shuts off when, for whatever reason, you lose control of the machine. The brushless motor and the correct protection against intruding dust and humidity make the DGA505ZJ a durable angle grinder that's suitable for frequent and intensive use.