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			Milwaukee Diamond Bits are designed for fast, efficient coring in a wide variety of concrete, including poured, steel reinforced and pre-stressed, as well as asphalt.  Our CONTRACTOR SERIES bits have crowns and  diamond segment designed for low cost drilling of smaller numbers of specific sized holes.   A 14 inch tube length is standard. The bit incorporates a 1-1/4 - 7 threaded back for attachment to the Diamond Drill Motor.  A Thread adapter may be needed to attach this bit to your diamond drill motor.  Check drill thread specifications. The Diameter of this bit is 4-1/4 inch.