SDS plus Rotary Hammer GBH 2-21. The GBH 2-21 Professional Rotary Hammer from Bosch with SDS plus technology is the ideal compact entry-level solution for powerful hammer drilling. Its powerful 720-watt motor and 2.0 joules of impact energy ensure effective hammer drilling in concrete up to a diameter of 21 mm. This compact rotary hammer offers an affordable Bosch Professional hammer drilling experience. Versatility and impressive results are guaranteed by the three hammer drilling settings for hammer drilling, drilling, and chiseling. This rotary hammer is perfect for use on concrete, stone, and masonry. The tool is compatible with the following external dust extraction systems: GDE 16 plus, GDE 68, and GDE 162. Included in the package are a tool case, 1 x SDS plus 6 mm drill bit, 1 x SDS plus 8 mm drill bit, 1 x SDS plus 10 mm drill bit, an additional handle, a machine cloth, and a depth stop.