The Makita HR4013C SDS MAX Rotary Hammer Drill 110 volt has a 40mm max in concrete. It features one touch sliding chuck, operation mode changing lever, soft no load function, unrivelled low level vibration, 4.5 m/sec vibration chiselling, 5 m/sec vibration hammer drilling, led service light indicates when to change the carbon brush, in hammering mode, on/off switch is switchable between two switches to meet your application: For Continous or Intermittent chiseling applications. Ultra low vibration: rotary hammer 4.5m/sec2 and Hammer 5.0m/sec2. 8.0J impact energy. 1450 - 2900 ipm impacts per minute. 110 volt machine. 1000w input wattage. 250 - 500 rpm no load speed.