Bosch has redefined heavy duty, power, performance, and robustness. The variable speed allows for simple and precise control of the RPM. Bosch's professional power tools for construction. For applications requiring material-specific speed, speed pre-selection yields the best results. Toolholder with SDS-plus technology for maximum power transfer. For rotary Hammers weighing 2 to 4kg. By unlatching clutch dogs and minimising torque, the user and the machine are protected in the event of overload or binding.