DEWALT D25603K 1-3/4-Inch SDS Max Combination Hammer SHOCKS - Active Vibration Control Reduces vibration felt by the user at the handles 2-Stage and E-Clutch 8.0 Joules of impact energy provides fast drilling and powerful chipping 13.5 Amp high-performance motor provides high performance & overload protection Chisel rotation mode allows the user to turn the chisel without having to remove it. SHOCKS - Active Vibration Control Reduces vibration felt by the user at the handles 2-Stage and E-Clutch 8.0 Joules of impact energy provides fast drilling and powerful chipping 13.5 Amp high-performance motor provides high performance & overload protection Chisel rotation mode allows the user to turn the chisel without having to remove it. Trigger lock on provides increased user comfort in extended use chipping ONLY applications