The Bosch 11263EVS SDS-max combination hammer features 2 modes of operation – rotary hammer or hammer-only and is a heavy-hitter with 9.6-Feet-Pound of impact energy in drilling mode and 1.1-Feet-Pound in chiseling turbo mode. The SDS-max bit system allows tool-free bit changes with automatic bit locking, dust protection and maximum impact energy transfer rate. This variable speed dial gives the user accurate bit starting and controlled chipping applications while constant response circuitry provides soft-start, maintains constant speed under load, provides overload protection. The turbo power feature delivers 20-Percent more power in hammer only mode. As with many Bosch hammers, a service minder light indicates when preventative maintenance is required. Vario-Lock positioning rotates and locks chisel into 12 different positions to optimize working angle while a 360-Degree auxiliary handle provides a wide range of movement along with operator comfort. The soft grip rear handle absorbs shock and vibration for operator comfort and less fatgue.