Hitachi DH24PF3 15/16-Inch SDS-Plus Rotary Hammer, 3-Mode, VSR (D-Handle) Three modes of operation; drilling only, hammering only and hammer drilling for flexibility within a range of applications Electronic variable speed control gives the tool a no-load RPM of between 0-1,150- best in class for fast drilling 2.5 ft/lbs of impact energy - best in class for delivering forcible hammering Lock-on speed button for continuous operation, reduces user fatigue 5.3 lbs, one of the lightest and most compact (15-15/16") rotary hammers in its class