Makita HM1317C 30mm Hex AVT Demolition Hammer 1510W 110VThe 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.