Dust ejection system removes majority of debris from the air which passes over the motor; preventing abrasion and tracking Items Included: Specifications Power Input: 1250 Watts Power Output: 680 watt No Load Speed: 9000 rpm Max. Disc. Diameter: 125 mm Spindle Thread: M14 Weight: 2.6kg Length: 385mm Height: 110mm Hand/Arm Vibration - Grinding: 11.9 m/s2 Hand/Arm Vibration - Grinding: 11.9 m/s2 Uncertainly K 1 (Vibration): 1.5 m/s2 Sound Pressure: 94 dB(A) Sound Pressure Uncertainty: 3 dB(A) Sound Power: 65 dB (A) Sound Power Uncertainty: 3dB (A) Sound Power Uncertainty: 3dB (A)