11.5 Amp motor delivers high output and overload protection Electronic Variable Speed allows the user to control the speed of drilling and chipping 8 ft-lbs of impact energy provides fast drilling and powerful chipping Spline toolholder is compatible with all spline drive bits Rubber grip helps reduce the level of vibration felt by the user when operating the tool Rear handle mount means less bending over when using tool in down drilling applications Bit Lock allows user to unwind jammed bits Factory clutch helps reduce the tools reaction to embedded steel when bits "lock-up" while in operation, preventing injury Modular construction allows service techinicians to repair tools quickly for less down time when you service tools 360° side handle allows user the ability to position the side handle wherever it best suits the application 1 3/4 Spline Rotary HammerConcrete Drilling = 1-3/4 " ,Impact Energy = 8 ft/lbs ,Amps = 11.5 Amps ,Chipping = Yes ,Wood/Steel Drilling = Yes with adaptor " ,No Load Speed 140-280 rpm ,Loaded Speed (bpm) = 1330-2660 bpm ,Clutch = Yes ,Tool Length = 18.5 " ,Tool Weight = 14.5 lbs