Tungsten carbide-tipped hammer drill bits designed to be used with rotary hammers with SDS plus holders. Offers durability when drilling in concrete and reinforced concrete. To prevent heat development the 4-flute dura design provides effective dust removal for increased endurance. Manufactured from high-alloy steel which is produced with an optimised hardening technology to withstand wear. For additional resistance indented cutting edges are made from an ideal Bosch-controlled carbide blend. Intended for on-site use and for work in concrete and masonry. Supplied in a sturdy case.