This 1-3/4 in. SDS MAX Combination Hammer hits hard with 8 joules of impact energy. Constant speed electronics maintain speed under load, even in the hardest concrete. Our Dewalt anti-rotation E-Clutch® system detects motion of the tool and shuts it down in bind up situations, helping to minimize sudden torque reaction compared to standard clutches. The lightweight design makes it ideal for horizontal serial drilling for no. 5 to 8 rebar, as well as coring and chipping in mid to upper wall applications. Shocks Active Vibration Control® technology reduces vibration for reduced user fatigue and increased productivity.