Vortex Diamond provides standard grade high quality wet concrete diamond notched-edge segmented core drill bit with 14 inch tube length for concrete coring. It is designed for delivering the highest performance and long life at an affordable price. The notched segments provide more speed and less resistance in reinforced concrete. This core drill bit is optimized for a wide range of construction materials including concrete, masonry, paves, bricks and blocks. Fits on drills with 1-1/4 in.-7mm shank.