DongCheng DZZ250 Diamond Drill with Water Source, a heavy-duty 3800W core drilling machine designed for large-diameter concrete drilling.Key SpecificationsModel: DZZ250Power Output: 3,800 WVoltage/Frequency: 220–240 V ~ 50–60 HzMax Drilling Diameter: ∅250 mm (10 inches)No-Load Speed: 580 r/min