SDS-plus Pro 4 Premium Hammer Drill / 15.0 x 210 mm. Intelligent geometry and quality down to the smallest detail ensure a long lifespan, precise drill holes, and maximum smoothness, even under the toughest conditions. Maximum safety is provided by the optimal symmetrical head geometry with four solid carbide cutting edges, which prevents snagging on reinforcement hits. Up to Ø 10 mm: features an innovative welded carbide head for maximum durability and larger dust extraction for the highest drilling speed. Power breakers create micro-cracks in the material for noticeably faster drilling progress. Vibration-free drilling is achieved through a four-helix variable spiral. Two large-volume spirals reliably and quickly remove drill dust from the hole, while two reinforced spirals provide additional safety and stability. Extremely break-resistant thanks to high-quality special steel. Offers a very long lifespan for up to 50% more circular drill holes suitable for dowels. Designed for professional use in the toughest natural stone, concrete, and masonry.