DEWALT DC212KA 18-Volt Cordless 7/8-Inch SDS Hammer SHOCKS - Active vibration Control reduces vibration up to 70%, increasing user comfort and productivity Compact L-shape design allows access in tight spaces, while providing optimal balance for the user 1.7 ft-lbs impact energy provides corded power without the cord variable speed reversible switch provides greater control when drilling Factory-set clutch reduces sudden, high torque reactions if bit jams; Electro-pneumatic hammer mechanism for fast penetration and low vibration