Rated Voltage: 20V DC Rated No Load Speed: 0-1400 RPM Impact Frequency: 0-4700 beats/min Maximum Drilling Diameter: Steel: 13 mm Wood: 28 mm Concrete: 24 mm Impact Energy: 2.2 J Drill Bit System: SDS Plus Optimum Drilling Range: 6-12 mm (Maximum 16 mm)