Makita HR5212C AVT Rotary Hammer, 2-Inch Powerful 15 AMP motor delivers 14 ft.lbs. of impact energy to handle the most demanding applications Anti-Vibration Technology (AVT) is a synchronized, three-component system that more effectively reduces vibration resulting in a low 9m/s2 Integrated damper spring at the base of the impact bolt is engineered to absorb impact vibrations from the drill bit Lock-on or trigger activation in "Chipping Only" mode with a push button start/stop control for more convenient operation Soft start suppresses start-up reaction for more control and better accuracy