This 1-Inch SDS Plus rotary hammer is powered by a DEWALT brushless motor that delivers a no load speed of 0 to 1100 RPM with 0 to 4600 BPM and 2.1 J of impact energy. The lightweight hammer incorporates SHOCKS Active Vibration Control technology for use in overhead applications. Rotary hammer kit is CSA certified.Brushless motor for extended runtime and durabilitySHOCKS- Active Vibration Control significantly reduces vibration and increases user comfort and productivity. A Perform and Protect Feature2.1 Joules impact energy provides corded power without the cordRetractable Utility Hook for convenient hanging and storage