The Bosch GBH2-26 1 in. Sds-plus bulldog Xtreme rotary hammer is a durable and powerful 8.0-Amp rotary hammer. Another of the notable Bosch bulldog hammers, this powerful and versatile tool combines user comfort with versatile drilling and hammering functions. Ideal for masonry pros or general contractors, this tool weighs only 6.4 lbs., but it has an upgraded 8.0-Amp motor that provides 2.0 ft.-Lbs. Of impact energy and 0-5,100 BPM. It has a multifunction mode selector for drilling versatility – drilling only, hammer drilling and chiseling. 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 tool has a Vario-Lock positioning system that allows the user to rotate a chisel into the optimal chiseling angle. An ergonomic pistol-grip handle provides comfort in hard-to-reach places or all-day tasks.. Maximum Hole Diameter in Wood- 1-1/4 inches