DEWALT D25553K 1-9/16-Inch Spline Combination Hammer Kit 12.0 Amp motor high performance and overload protection, 490 rpm, 3300 bpm 8.0 ft-lbs of impact energy provides fast drilling and powerful chipping Rear handle mount for increased user comfort in down drilling applications Rubber grip helps reduce the level of vibration felt by the user. Tool length: 18.6 inches Factory-set clutch reduces sudden, high torque reactions if bit jams