Bosch 1194AVSRK 8 Amp 1/2-Inch Hammer Drill 8.0 amps, 0-1000/2600 RPM, 0-16,000/0-41,600 BPM 2 Speed gear box - Matches speed and torque to the job Dual function control - Quickly converts from rotation only to hammer w/rotation Variable speed and reversing switch offers complete control for drilling, driving and removing bits or screws All ball and roller bearing construction - Smooth Power transmission and extended tool life