Very Nice, Looks like it has only been used one time. Shank size 35mm from Flat to Tip of the triangle shaped shank. The diameter of the cutting head is about 39.4mm so with an insert in it your minimum bore hole size would need to be a little larger than that.I could not find details about this tool on the Sandvik site. Spot facing reverse RH Right Hand Cut back side counterbore indexable boring toolholder. Other info on the tool. This item is in the category "Business & Industrial\CNC, Metalworking & Manufacturing\Workholding & Toolholding\Toolholding\Adapters & Holders\Boring Bar Holders". The seller is "dj-machinery" and is located in this country: US. This item can be shipped to United States.