Features and Benefits:?1", 20MM Arbor?Desgined to be used Wet or Dry?Extended Life?Fast Cutting?For use in concrete-lined cast iron pipeMilwaukee diamond blades are designed to the highest standards, only using quality diamonds. Available in sizes 4 in. to 14 in. Milwaukee's diamond blade line will cover a full range of materials including specialized blades for green concrete, asphalt, and ductile iron. All Milwaukee blades are designed for both wet and dry cutting.