The Bosch 11250VSR 7/8" SDS-plus Bulldog Rotary Hammer weighs only 5.5 lb, but it has a muscular 6.1-amp motor that provides 1.7 ft/lb of impact energy. It has an ergonomic pistol-grip handle, which provides outstanding comfort and performance in hard-to-reach or all-day tasks. HVAC or MEP pros will be more productive on the jobsite with this tool. It has a dual-mode selector for drilling versatility - rotary hammer or rotation-only mode. The 11250 has a rotating brush plate for longer brush life and a variable-speed reversing trigger for accurate bit starting. The SDS-plus system provides for tool-free bit changes with automatic bit locking. It has an integral clutch to minimize risky torque reaction.