High Speed diamond core bits are specially designed for high speed drilling. Unique diamond segment design can increase drilling speed as much as 30% over conventional bits. diamond core bits are heavy-duty, multi-purpose bits for drilling in many types of materials including reinforced concrete, cinder block, construction wall,etc.All of specifications of the diamond tools are made with selected synthetic diamonds and we do believe that you will be satisfied with our excellent quality with competitive prices & good service. Please visit our website for further information and do not hesitate to contact us.