Delivering 45% less vibration and 20% more impact energy than the previous model, Makita's SDS-MAX AVT Rotary Hammer Drill is engineered with enhanced Anti-Vibration Technology (AVT), a synchronized 3-component system for significantly less vibration. The result is a category-leading vibration rating of 5 m/sec sq. The powerful 11 Amp motor delivers 11.4 joules (8.4 ft. lbs.) of impact energy, 20% more than the previous model for faster drilling. An added feature is the option of lock-on or trigger-activated in the "chipping only" mode, with a push button start/stop control for more convenient operation. This hammer drill is engineered for a range of concrete applications including drilling/coring through-holes for pipes, setting larger anchors, securing tilt-wall supports, small chipping applications and more. It is ideal for a range of trades including masons, concrete contractors, demolition contractors, plumbers, electricians, sprinkler installers and general contractors.