The Bosch GBH 3-28 DFR Professional Rotary Hammer with SDS-plus offers top performance with low vibration. It has a 20% higher chiselling performance than any other rotary hammer in its class, and low vibration thanks to Bosch Vibration Control. The quick-change chuck makes for fast changes between drilling with impact in concrete and drilling without impact in wood and metal. The L-shaped design makes for comfortable working and balanced weight distribution, there is also a rotation stop for use when chiselling. There is a rotating brush plate for equal power in forward and reverse rotation and impact stop for drilling in wood and metal. This rotary hammer comes with an auxiliary handle, carrying case, depth stop (210mm), keyless chuck (13mm) and SDS-Plus quick change chuck. Rated power input - 800W Max. impact energy - 3.1J Impact rate at rated speed - 0 - 4000bpm Rated speed 0 - 900rpm Weight - 3.6kg Length - 354mm Height - 233mm Toolholder - SDS-plus Drilling diameter in concrete with hammer drill bits - 4 - 28mm Optimum range of applications in concrete with hammer drill bits - 12 - 18mm Max. drilling diameter in masonry with core cutters - 82mm Max. drilling diameter in steel - 13mm Max. drilling diameter in wood - 30mm