Bosch is the home of the world's best selling hammers. Bosch hammers have reduced vibration without any reduction in performance. The SDS-plus® rotary hammer, works harder, lasts longer, and vibrates less. It has the fastest chiseling and drilling in its class. In. addition, it provides the longest life, with lowest vibration levels. Includes Auxiliary Handle Carrying Case Specifications Attributes Amperage 8.0 Chuck Design Keyless Chuck Size 3/4 in SDS-Plus Impact Energy/EPTA (ft. lbs.) 2.6 Ft.-Lbs. Non-EPTA Length 12.5" Material Metal, Plastic Max. Hole Dia. - Core Bit 3-1/8" Max. Hole Diameter in Concrete 1-1/8" No Load BPM 0-4,000 No Load RPM 0-900 Voltage 120V Weight 7.7lb Width 3.0" Includes Auxiliary Handle, Carrying Case Benefits 360° Auxiliary handle Integral clutch Multi-function selector Variable speed 3 finger trigger Active Vibration Control™ in the (1) hammer mechanism and the (2) grip area provides maximum user comfort for extended periods of work