JMJ Diamond Tools provides high quality products to meet our customers needs. We could also help you to find and even design your products to achieve your goals by quality, quantity and services. Thank you for your business and let us win together! ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 2 1/4-inch SuperPlus Diamond Core Bit for Drilling Concrete and Asphalt in Dry Condition Super Plus Quality Diamond Core Bit to Drill Concrete and Asphalt  Dry condition 11" long 5/8"-11 Thread Segment Height: 0.400"