![Criterion - 3 Inch Outside Shank Diameter, 1-1/2 - 18 Inside, Boring Head Shank Reducer - 1-1/4 Inch Projection, 1-1/2 Inch Nose Diameter - Exact Industrial Supply](http://indtoolandsupply.com/cdn/shop/products/comingsoon_1415516f-368e-4b47-96e3-073f608cab31_1024x1024.png?v=1586484636)
Criterion - 3 Inch Outside Shank Diameter, 1-1/2 - 18 Inside, Boring Head Shank Reducer - 1-1/4 Inch Projection, 1-1/2 Inch Nose Diameter
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