Concrete drilling requires a versatile, fast and efficient precision tool. The Dewalt SDS+ rotary hammer provides 3.5 joules of impact energy for fast drilling and is equipped with a durable German-engineered hammer mechanism. The wide optimal drilling range (between 3/16" and 7/8") eliminates the need for multiple tools. SHOCKS Active Vibration Control technology reduces vibration felt at the handles for less user fatigue and increased productivity. The factory-set clutch reduces sudden and high torque reactions when the bit gets jammed. The handle features an ergonomic optimized that provides great control, regardless of the orientation. This set comes with a 3-year limited warranty, a 2-year free service contract and a 90-day money back guarantee.