Powerful motor · Dust proof washer on all ball bearing, for protecting from the grinding dust. · Pad brake allows the tool to start sanding without making any mark on the work piece. Specifications: Voltage: 220V/60 hz Power: 570 Watts Wheel diameter: 100mm (4") No-load speed: 12,000 rpm Net Weight: 1.8kg (3.9 lbs.) Inclusions: Grinding Disc for Metal Cut Off Wheel for Metal Side Handle Lock Nut Wrench