Bosch GBH 2 28 DFV Professional Rotary Hammer with SDS plus (Heavy Duty) 850W Makita Cut Off Saw Designed so that the vertical Designed so that the vertical center line of the handle bar stays aligned with that of user Enables to drive screws even without pre drilling pilot holes 1 kg Tool Dimensions (Length) 402 mm Tool Dimensions (Height) 216 mm Tool Holder SDS plus Drilling Diameter Concrete (Hammer Drill Bits) 4 – 28 mm Optimal Application Range Concrete (Hammer Drill Bits) 8 – 16 mm Drilling Diameter in Concrete with Core Cutters 68 mm Max 25% longer lifetime than other rotary hammers in its class for more efficiency