"The DEWALT 1in. D-Handle SDS Rotary Hammer is powered by an 8 Amp motor to provide high performance and overload protection. Variable speed trigger allows user to instantly control speed from 0 to dialed setting. Delivers 2.5 ft.-lbs. of Impact Energy, providing fast drilling and powerful chipping. SHOCKS Active Vibration Control reduces vibration up to 50 while increasing user comfort and productivity. Mode selector allows for usage in rotary hammer, rotary only, and chiseling applications. Reversing feature helps release tool from bind up situations and assists with removal of fasteners. Integral clutch reduces sudden, high-torque reactions if bit jams. 360 side handle adjusts easily for preference or use in tight spaces. Variable Speed Yes, Tool Length in. 17.7, Impact Energy J 2.5 ft.-lbs., Hammering Modes Rotary hammer, rotary only, chisel, Rated RPM 0-1,150, Case Included Yes, Amps 8, Tool Weight lbs. 7, Blows Per Minute BPM 0-4,300. Optimal Concrete Drilling 5/32in.- 5/8in. Impact Energy 2.5 ft.-lbs. SHOCKS vibration control Vibration measurement 10.0 m/s2 No-load speed 0-1150 RPM 0-4300 BPM Chipping Yes Clutch Yes Wood/Steel Drilling With adaptor Variable speed switch User preferred balance for downward drilling"