Makita HM1511 AVT Electric Breaker 110v The HM1511 series of corded electric breakers is developed based on their HM1317C series. This breaker features drastically increased power and low vibration, but with a minimum increase in tool size and weight.  FEATURES Anti-vibration housing and AVT for reduced operator fatigue Soft start \"Soft no load\" function automatically reduces the motor speed during idling to suppress the vibration of the machine body Double insulation High power Service indicator lamp that indicates when to replace carbon brush On/off slide switch Power-ON indicator lamp SPECIFICATION Impact Energy: 48.9 J Blows Per Minute: 1300 bpm Drive Shank Hex: 30mm Net Weight: 19.2 kg Input Wattage 110v: 1,550 w Input Wattage 240v: 1,850 w SOUND & VIBRATION Noise Sound Pressure: 85 dB(A) Noise Sound Power: 105 dB(A) Noise K Factor: 1.57 dB(A) Vibration Chiselling: 6.5 m/sec² Vibration K Factor: 1.5 m/sec² Available In 110v & 240v