The Makita HM1317C Demolition Hammer offers high durability and excellent demolition performance. Suppression of motor speed during no load reduces vibration of the tool body. The unique Makita AVT Anti-Vibration Technology design employs the pneumatic pressure created in the drill's hammer piston chamber, to move a counter balance in the opposite direction, reducing the impact vibrations at the steel point. This dramatically reduces vibration. Supplied with 1 x Bull Point, 1 x Side Handle and 1 x Carrying Case. Specification Input Power 1,510W No Load Speed 730-1,450/min. Impact Energy 21 joules Shank Size 30mm Weight 17kg Vibration Chiselling 8.5 m/sec. Vibration K Factor 1.5 m/sec Noise Sound Power 101 dB(A). Noise Sound Pressure 81 dB(A). Noise K Factor 2.4 dB(A).