This hammer drill works perfectly in various occasions, including breaking concrete, chiseling walls, drilling woods and etc. It has an ergonomic pistol-grip handle, which provides outstanding comfort and performance in hard-to-reach or all-day tasks. 3-mode action: hammer drilling, drilling only and hammering only. For effective chiseling, the item includes vario-lock positioning, which allows the user to rotate and lock a chisel into the optimum working angle. The Hammer drill 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.