SDS-plus Pro 4 hammer drill / 8.0 x 400 mm. Highest drilling speed is achieved by reducing friction and improving impact transmission due to the special cutting edge geometry on the chisel-shaped drill head. It features a stable and durable center point for pinpoint drilling. Power breakers create microcracks in the material for noticeably faster drilling progress. Enlarged reinforcement phases reduce the likelihood of snagging on reinforcement hits. The large-volume 2-spiral helix geometry with core reinforcement allows for rapid conveyance of drill dust and maximum fracture resistance. Suitable for use in concrete, masonry, natural stone, and granite.