Tungsten carbide tipped. High standard, double flute for efficient waste removal. For concrete, masonry, lightweight block and stone. Suitable for use with SDS+ rotary or percussion drills, the bit delivers professional results in concrete and masonry. Drills clean, accurate fixing and clearance holes. For use with SDS+ rotary or percussion drills. Tungsten carbide tip for extra long life. Clean and fast drilling in concrete and masonry. Fluted helix ensures rapid dust removal.