Bosch 11228VSR 7/8-Inch SDS Rotary Hammer SDS-plus bit system - tool-free bit changes with automatic bit locking, dust protection and maximum impact energy transfer rate Multi-function selector - 3 modes of operation, rotation only, rotary hammer and hammer only mode Pistol grip handle - Compact ergonomic design Vario-LockTM positioning - rotates and locks chisel into 36 different positions to optimize working angle Variable-speed reversing trigger - for accurate bit starting, as well as removing fasteners or bound bits