17 lb. AVT® Demolition Hammer, accepts SDS-MAX bitsModel HM1111CAnti-Vibration Technology for 2X Less Vibration- Powerful 14 AMP motor delivers 12.7 ft.lbs. of impact energy to handle the most demanding applications.- Anti-Vibration Technology is an internal counterbalance system that greatly reduces vibration for increased user comfort and greater productivity.- Detached rear handle is spring loaded and engineered to provide less vibration and more control- Constant speed control automatically applies additional power to the motor to maintain speed under load to complete the most challenging jobs.- Soft start suppresses start-up reaction for more control and better accuracy. - Variable speed control dial enables user to match the speed to the application for greater versatility.- L.E.D. service light notifies the user approximately 8 hours before the brushes need to be replaced.- L.E.D. power light indicates switch failure or cord damage.