Rotary hammer with SDS plus GBH 2-21. The Bosch GBH 2-21 Professional rotary hammer with SDS plus technology is the ideal compact entry-level solution for powerful hammer drilling. Its strong 720-watt motor and a impact energy of 2.0 joules ensure effective hammer drilling in concrete up to a diameter of 21 mm. This compact rotary hammer offers affordable Bosch professional hammer drilling performance. 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 device is compatible with the following external dust extraction systems: GDE 16 plus, GDE 68, and GDE 162. A carrying case, additional handle, and depth stop are also available.