From the Manufacturer The DEWALT DEWALT D25211K Heavy-Duty 1" SDS D-Handle Single Mode Hammer features 2.2 ft-lbs of impact energy that provides for fast drilling and powerful chipping. The unit has an 8.0 Amp motor that provides high performance and overload protection. This rotary hammer has a capacity to cover a broad range of mechanical and epoxy anchoring applications. The optimal range for this hammer in concrete is 5/32"-5/8". The reverse feature assists in the removal of fasteners. Use the tools variable speed for precise hole placement on work surface. The tool comes with a factory set clutch which reduces sudden, high torque reactions if the bit jams. The 360 degree side handle adjusts easily for preference or use in tight spaces.