We have Bosch 11316EVS SDS-Max Demolition Hammer with Product Detail SDS-max bit system - tool-free bit changes with automatic bit locking, dust protection and maximum impact energy transfer rate Variable-speed dial - for controlled chipping applications Constant Response Circuitry - - Provides soft-start - Maintains constant speed under load - Provides overload protection Service Minder light - indicates when preventative maintenance is required Vario-Lock positioning - rotates and locks chisel into 12 different positions to optimize working angle . The "Bosch 11316EVS SDS-Max Demolition Hammer" is best product for you. We recommended Bosch 11316EVS SDS-Max Demolition Hammer