Chuck Diameter: 20mm Rated Voltage: 220~240V / 110 V Rated Frequency: 50Hz / 60Hz Rated Input Power: 620W No Load Speed: 0-1000r/min Impact Rating : 0-4400r/ min Case Qty.: 5 Pcs G.W./N.W.: 24/22KG Packing Size: 59*45*31 CM