Bosch, 1-5/8", 13A, SDS-Max, Combination Hammer, 8.1 FTLB Impact Energy & 14.3 LB Active Vibration Control, Vibration Reduction In The Hammer Mechanism & The Grip Area Provides Maximum User Comfort For Extended Periods Of Work, 1 Hand Tool Free System, Makes Changing Bits Easier While Maximizing Jobsite Productivity, Constant Response Circuitry, Maintains Speed Under Load & Overload Protection, Turbo Power, Delivers 20% More Power In Hammer Only Mode, Vario-Lock Positioning, Rotates & Locks Chisel Into 12 Different Positions, Auto-Max Variable Speed Dial, Ensures Maximum Speed Every Time The Tool Is Turned On, Service Minder Light, Indicates When Preventative Maintenance Is Required, Patented Cord Turret, Includes Auxiliary Side Handle & Carrying Case.