The MK Diamond MK-Black 156382 2-1/2-inch Wet Cutting Concrete Core Bit 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. With a bit length of 14-1/2 inches, this MK Diamond MK-Black 156382 2-1/2-inch Wet Cutting Concrete Core Bit is ready to work.