The SDS-plus 1 1/4" Rotary Hammer with Quick-Change Chuck System is a 8.5-amp tool that delivers 3.1 ft.-lbs. of impact energy, but it weighs only 10.3 lbs. for a top performance-to-weight ratio. The multifunction selector gives the user the versatility to match mode to application, rotary hammer, rotation-only or hammer-only mode. Concrete contractors will appreciate the production in drilling holes in concrete and chiseling masonry. The quick change chuck allows the fast and simple exchange of an SDS-plus chuck. It has Vibration Control in the hammer mechanism and grip area to provide improved user comfort. The hammer provides an integral clutch for bind-up situations.