Elastic rubber suction ring with low-wear metal ring glides smoothly over the surface and protects against dust and ejecting stones. The dust extraction feature protects against abrasive dust, reduces disc wear, and keeps the concrete pores open for recoating. The soft start ensures safe starting without overloading the power supply, and there is a restart lock after power failure. The suction hood has stepless height adjustment, and the suction nozzle has a 32 mm outer diameter. The spindle lock is included, making it very well suited for large-area removal. Optimal guidance is provided through the rear handle grip, and the ergonomic bow handle is vibration-damped and steplessly adjustable for optimal handling and machine guidance.