Hitachi DH24PC3 15/16-Inch SDS Plus Rotary Hammer, VSR 3-Mode  (Discontinued by Manufacturer) Impact energy of 2.5-feet per pound 3-modes of operation for greater versatility Quick-set bit system makes replacing bits quick and easy Lock-on speed button for continuous operation Comes with a 1-year limited warranty Impact energy of 2.5 ft./lbs 3-Modes of operation for greater versatility Quick-set bit system makes replacing bits quick and easy Lock-on speed button for continuous operation Electronic variable speed control gives the tool a no-load RPM between 0 -1,050