The DeWalt spline hammer kit meets the needs of the toughest industrial job site conditions. The D25550K features an 11 Amp motor that provides 140 to 280 RPM and 1330 to 2660 BPM. The RPM and impact energy can be controlled by the variable-speed/impact controller and provide a range of .73 to 7.3 ft-lbs of impact energy per blow. The electronic variable speed also ensures that the proper amount of power is being delivered to the motor, providing outstanding drilling and chipping speed. The soft-start, two-position side-handle mounts and rubber grips help make job site applications easier and more comfortable. The hammer is 18-1/2 long and has a maximum solid bit size capacity of 1-9/16.