Milwaukee Diamond Dry Core Bits are designed to the highest standards, only using quality diamonds. Available in sizes 1 in.-6 in., Milwaukee Diamond Dry Core Bits are ideal for drilling brick and block with no reinforcement. The large slots facilitate cooling of the bit as well as extracting the cores. The thinner wall provides increased drilling speed. This bit is 10 in. in length and contains a 5/8-11 thread. For Use With Hand Held Core Rig or Grinder