Closed circuit which is almost dust free, when connected to an appropriate Blastrac dust collector. 3 planetary rotating discs 185 mm. Heavy duty frequency drive. LCD screen for all required information, such as amperage and rotating speed of the diamond tools. Double protected emergency stop. Separate drive system for central rotation and 3-disc planetary distribution. User friendly and comfortable to use with low vibration. No risk of underground deterioration. Can work even in places with high hygiene and safety standards (food, pharmaceutical, medical industries). Perfect for decorative floor applications. Convenient for dry and wet applications, indoor, outdoor. Floating shroud with brush for every application. Many optional tools, which are easy to change because of the patented DIAMAG system.