The Makita HR166DZ Brushless Rotary Hammer offers 2 modes of operation: rotation only, rotation with hammering. For added control there is a variable speed control trigger, it also offers both forward and reverse rotation. Fitted with a one touch sliding chuck for easy bit installation and removal. Compact and lightweight design with vibration absorbing housing to provide maximum control and comfort. There is also an electric brake for added safety and an LED job light. Comes as a Bare Unit, No Battery or Charger. Specification: Modes: Rotary drilling and Hammer drillingNo Load Speed: 0-680/min.Impact Rate: 0-4,800/bpmImpact Energy: 1.1 joulesCapacity: Concrete 16mm, Wood 13mm, Steel 10mmWeight: 1.8kg