The SDS-Plus ratory hammer drill with a powerful motor let you finish any projects on Masonry, Concrete, Brick, Stone etc. or you can use the extra chuck for normal shank for metal and wood jobs. FOUR FUNCTIONS Use the Knob to switch between (Demolition HAMMER DRILL) to make holes with SDS Drill bits, (Jack Hammer Chiseling) both position ideal for projects on Concrete, Brick, and Granite, etc., and normal (Drill Position) ideal for drilling and making holes in wood, metal, aluminum, etc. Soft-grip Handle for comfortable handling and optimal control with Vibration Reduction System ensures optimal working comfort and low vibrations side handle for secure two-handed control and low vibrations. SAFETY CLUTCH offers protection if the bit ever gets jammed while use it in any tasks such as brick chipping, tile and floor removal, or even making hole in concrete, masonry, metal, or wood. Anti-Vibration Technology (AVT) for low vibration.