SDS-plus Pro 4 hammer drill / 12.0 x 450 mm. Highest drilling speed by reducing friction and improved impact transmission due to special cutting edge geometry on the chisel-shaped drill head. Stable and durable center point for pinpoint drilling. Power breakers cause microcracks in the material for noticeably faster drilling progress . Enlarged reinforcement phases reduce the likelihood of snagging in reinforcement hits. Large-volume 2-spiral helix geometry with core reinforcement for rapid conveyance of drill dust and maximum fracture resistance. For use in concrete, masonry, natural stone, granite.