The Bosch GBH 3-28 DFR Professional Rotary Hammer has been developed for various drilling applications in concrete stone metal and steel It offers a high drilling rate and 20 higher chiselling performance than other rotary hammers in its class Bosch Vibration Control provides low vibration working only 13 ms² for more comfortable working Quick-change chuck for fast changes between drilling with impact in concrete and drilling without impact in wood and metal It has offers rotation-stop mode for chiselling and impact-stop for drilling in wood and metal Fitted with a ball grommet to prevent cable breaks and a rotating brush plate for equal power in forward and reverse rotation Supplied with 1 x SDS Plus Quick-Change Chuck 1 x 13mm Keyless Chuck 1 x Auxiliary Handle 1 x 210mm Depth Stop and 1 x Carry Case Specification Input Power 880W No Load Speed 0-900min Impact Rate 0–4000bpm 31 joules Capacity Concrete Hammer Bits 4–28mm Core Cutters 68mm Masonry Core Cutters 82mm Steel 13mm Wood 30mm Length 354mm Height 233mm Weight 36kg