The Makita HR4013C 40mm AVT SDS MAX Rotary Hammer has been developed to provide higher operating efficiency and more comfort with an unrivalled low level of vibration. It has a one touch sliding chuck for easy bit installation and removal and a easy to operate operation-mode change lever. This is located on the top of the motor housing for reduced possibility of breakage. The soft no load function automatically reduces the motor speed during idling to suppress the vibration of the machine body. There is a handy LED service light that indicates when to replace carbon brush, preventing additional damage to the gearings. The vibration absorbing housing offers unrivalled low level of vibration. In hammering mode, the on/off switch is switchable between two switches to meet your application, for Continuous or Intermittent chiseling applications. Specification Input Power: 1,000 Watt.No Load Speed: 250-500/min.Impact Rate: 1,450-2,900/bpm.Impact Energy: 8.0 Joules.Max in Concrete: 40mm.Weight: 6.8kg. Vibration K factor1.5 m/sec.Vibration: Chiselling4.5 m/sec.Vibration: Hammer Drilling: 5 m/sec. The Makita HR4013C 40mm AVT SDS MAX Rotary Hammer 1000 Watt 240 Volt Version. PTDMAKHR4013C