The MK-Yellow is our standard core bit, and is an excellent choice for all types of general wet drilling. The MK-Yellow delivers fast drilling and good footage. The MK-Orange is a premium bit designed for wet drilling applications that include light to moderate steel reinforcement. The high diamond concentration ensures excellent footage and cutting speed. The MK-Black is a supreme core bit engineered for exceptional footage and fast/aggressive drilling characteristics. Excellent performance in applications associated with moderate to high steel reinforcement.

DiamondSure brand diamond core drill bits, also known as diamond hole saws, are used on glass, ceramics, porcelain, stone, ceramic and porcelain tile, limestone, slate, marble, fiberglass and granite.  Core drill bits have a hollow center and cut in a circle to create a hole.  Diamond core bits are available in sizes from 5/6" to 4"(outside diameter).