Max Drilling Diameter: 24Mmrated Voltage: 220Vrated Frequency: 50Hzrated Input Power: 620Wno-Load Speed: 0-1000Rpmimpact Speed: 0-4850Rpmrotary Hammers Can Be Used For "Doweling" (Repetitive Drilling Of Large Rebar Anchor Holes), And Drilling Through-Holes In Concrete And Masonry Walls. The Hammering Action Helps Break Up The Masonry So That It Can Be Removed By The Drill Bit 'S Flutes