BOSCH 11255VSR 1 in. SDS-Plus 8 Amp Corded Variable-Speed BULLDOG EXTREME Rotary Hammer is the fastest and longest lasting breed of the rotary hammer. The totally redesigned bulldog extreme outlasts the competition in both speed and performance. Multi-function Selector has 3 modes of operation: rotary hammer, hammer-only and rotation-only mode. Vario-Lock positioning rotates and locks chisel into 36 different positions to optimize working angle. The innovative rotating brush plate provides equal power in forward and reverse. Cord Turret has a 35-degree pivot for added flexibility and longer cord life. SDS-Plus bit system tool-free bit changes with automatic bit locking, dust protection and maximum impact energy transfer rate together with variable-speed reversing trigger for accurate bit starting as well as removing fasteners or bound bits. Integral clutch helps minimize torque reaction. The 11255VSR also has a comfortable D-handle grip design for greater control, especially when drilling overhead or downward.