SDS-plus Pro4 Premium Hammer Drill, 28.0 x 450 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 during reinforcement strikes. For diameters up to 10 mm, the innovative welded carbide head offers maximum durability and larger dust removal for improved drilling speed. Performance breakers create micro-cracks in the material for noticeably faster drilling progress. Vibration-free drilling is achieved through a four-helix variospiral design. Two large-volume spirals effectively and quickly remove drill dust from the hole, while two reinforced spirals provide additional safety and stability. The drill is extremely break-resistant due to high-quality special steel and offers a very long lifespan for up to 50% more circular drill holes suitable for dowels. Ideal for professional use in the toughest natural stone, concrete, and masonry.