Makita has a deep line-up of concrete solutions, including premium carbide bits for concrete drilling. Makita Spline 6-Cutter Bits feature premium carbide tips for efficient drilling and longer service life. The 6-cutter design is engineered for faster drilling in concrete and reinforced concrete. The bits are engineered to deliver rounder holes for more efficient anchor setting. Makita Spline 6-Cutter Bits are ideal for a range of general purpose drilling applications in concrete and reinforced concrete.