The Makita HR3210C SDS Plus AVT Rotary Hammer Drill 850 Watt with 3 drilling modes of operation Rotary drilling, Hammer drilling or Chiseling. Rotary drilling with hammer support can be selected as can pure hammer-only action for heavy-duty breaking and chiselling. It has a soft start operation to ensure a smooth and even start every time, and the torque limiter stops the drill when the bit hits against reinforcements. It also has a built in job light. It features the unique Makita AVT Anti-Vibration Technology design employing the pneumatic pressure created in the drills hammer piston chamber to move a counter balance in the opposite direction to reduce the impact vibrations at the steel point. This dramatically reduces vibration. It is supplied with a side handle, depth stop, bit grease and a carry case. Input Power 850W No Load Speed 315-630/min. Impact Rate 1,650-3,300/bpm Impact Energy 5.0 joules Capacity Concrete 32mm, Core Diameter (TCT) 90mm Weight 4.9kg All vibration figures quoted are Tri-axial to EN60745 2006. Vibration Drilling 2.5 m/sec Vibration Chiselling 7 m/sec Vibration Hammer Drilling 10 m/sec Vibration K Factor 1.5 m/sec Noise Sound Pressure 89 dB(A) Noise Sound Power 100 dB(A) Noise K Factor 3 dB(A)