Milwaukee® diamond wet core bits are designed to the highest standards, only using quality diamonds. Available in sizes 3/4 to 14 in. Milwaukee® diamond premium wet core bits offer exceptional drilling life and speed in cured concrete with hard aggregate and medium steel reinforcement. Designed with threaded cap for easily extending the core bit. This bit is 15 in length and contains a 1-1/4-7 thread. Milwaukee® Wet Core Bit, Premium Grade, 6-1/4 in Drill - Fraction, 6.25 in Drill - Decimal Inch, 15 in Overall Length, 15 in Cutting Depth, Diamond Cutting Edge, Applicable Materials: Concrete, Hard Aggregate, Masonry and Medium Steel Reinforcement