The new Makita HR4013C SDS max rotary hammer will punch a 40mm hole in concrete and with a 1,000 watt motor that will run up to 500rpm without load, this machine will generate up to 2,900 blows per minute for 7.6 Joules of impact energy. This represents a 25% increase over the popular HR4011C model that it supersedes. The latest application of Makita’s patented AVT, anti- vibration technology, features the latest version of the body design that completely insulates the grip handles from the motor and transmission section of the machine. This rugged 2-mode machine –rotary drilling with hammer action and hammer action-only for chiselling- has the easy-to-operate mode change switch positioned conveniently on top of the motor body ahead of the vibration reducing rear grip handle.With variable speed controlled by the grip trigger, and a constant speed control that can be set for constant running when chiselling, theHR4013C can also be used with the trigger controlling chiselling for intermittent work.