Bosch RH228VC-RT 1-1/8-Inch SDS-plus Rotary Hammer (Certified Refurbished) Counter-Balance Vibration: Vibration reduction in the hammer mechanism for lowest vibration levels in its class Metal Gear Housing: Jobsite Durability ntegral Clutch: Helps minimize torque reaction 3 Modes of Operation: Hammer drilling, chiseling, drilling only Hammer Hook: Quick storage of the tool Factory reconditioned