The Bosch 11253VSR 1-In. SDS-plus Bulldog Xtreme Rotary Hammer is a powerful and versatile tool that combines user comfort with versatile drilling and hammering functions. It weighs only 6.4 lbs., but it has a beefy 7.2-AMP motor that provides 2.0 ft.-lbs. of impact energy. It has a multifunction mode selector for drilling versatility – rotary hammer, hammer-only or rotation-only mode. An ergonomic pistol-grip handle provides comfort in hard-to-reach places or all-day tasks. This hammer is ideal for contractors or HVAC pros. With a rotating brush plate for longer brush life, this hammer provides a variable-speed reversing trigger for accurate bit starting. The SDS-plus system provides for tool-free bit changes with automatic bit locking. The Bulldog Xtreme has a Vario-Lock system that allows the user to rotate a chisel into 36 positions, and an integral clutch to minimize risky torque reaction.