1 3/4 SDS Max Rotary HammerConcrete Drilling = 1-3/4 " ,Impact Energy = 8 ft/lbs ,Amps = 11.5 Amps ,Chipping = Yes ,Wood/Steel Drilling = Yes ,No Load Speed = 140-280 rpm ,Loaded Speed (bpm) = 1330-2660 bpm ,Clutch = Yes ,Tool Length = 18.5 " ,Tool Weight = 13.4 lbs 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 SDS max toolholder is compatible with most bits the user has Rear handle mount means less bending over when using tool in down drilling applications Factory clutch helps reduce the tools reaction to embedded steel when bits "lock-up" while in operation Modular construction allows service techinicians to repair tools quickly for less down time when you service tools 360-degree side handle allows user the ability to position the side handle wherever it best suits the application