Fitment: 3 Inch Precision Boring Head 0.001" Adjustment Radius with 1-1/2-18 Thread Description： Body Diameter 3 Mount Type Threaded Boring Bar Hole Diameter 3/4 Distance Between Hole Centers 0.925 Threaded Mount Size 1-1/2-18 Max. Offset 1 Dial Reading 0-100 Diameter Direct Reading 0.001" Package Includes: 1* 3" High Precision Threaded Boring Head 0-100 0.001" Reading .
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