Crown CT10032 Electric Impact Drill, 16mm - 1050W, Multi-Color, 0.5 Inch, 220.0V Rated Power: 1050W Input Voltage: 220-230V Electrical Power: 4.9A Hole Diameter in Concrete: 20/16mm Drill Diameter In iron: 13/13 mm Drilling force in wood: 40/30 mm Drilling rate in the first speed: 0-14400 rpm Drilling rate in the second speed: 0-40000 rpm Speed without load in the first speed: 1- 900 RPM No-load speed in second gear: 1-2500 RPM