Bosch RH850VC 120-Volt 1-7/8" SDS-max Rotary Hammer SDS-max: Tool-free bit changes with automatic bit locking, dust protection and maximum impact energy transfer rate Best in class Impact Energy: Impact energy of 12.1 ft lbs provides maximum productivity in all day demolition applications Vario-lock: Rotates and locks chisel into 12 different positions to optimize working angles Selector knob: Select between hammer drilling, chiseling only and the Vario-Lock function. Impact Energy/EPTA (ft. lbs.): 9.3 ft. / lbs. EPTA Variable Speed Dial: for controlled drilling and demolition applications. Amperage 13.5