Featuring an entirely new concept, Hilti TE-CD and TE-YD hollow drill bits make the previously essential step of hole cleaning after drilling entirely unnecessary. Drilling dust is extracted by the vacuum system while drilling is in progress. Users also benefit from faster drilling and a virtually dustless working environment. This results not only in maximum reliability and security in terms of the hold obtained by the anchor installed in the hole, it also improves health and safety at the workplace. The new drill bit system is designed to achieve greatest possible efficiency and effectiveness, especially in repetitive drilling applications.