Bosch Rotary Hammer RH745 1 3 4 Inch SDS max (8.2 Ft Lbs Impact Energy 13.5 Amp 2750 BPM Concrete Demolition Core Drilling Construction Tool Unit) Concrete Vibrators this high performance layout tool generates this high performance layout tool generates up to a 219 MPH maximum air velocity rating paired with 113 CFM of volume capacity to sweep away dense sawdust packs 11 Laser Welded Diamond Segments: High integrity laser welding joins diamond cutting segments directly to the steel tube for maximum safety under high torque 360 Degree Auxiliary Handle: Fully adjustable side handle rotates completely around the tool body to provide a comfortable grip across any working angle 2 Ft Lbs (EPTA Impact Energy Force) No Load BPM Range 1