Bosch 11263EVS 1-3/4-Inch SDS-Max Rotary Hammer From 145-280 no load RPM, 1,350 - 2,800 no load BPM Serious 9.6-feet-pounds of impact energy SDS-max bit system allows for tool-free bit changes Constant response circuitry provides soft-start and maintains speed Service minder light indicates when preventative maintenance is required