Vertex Boring Head Metric Graduations. These are a quality boring head.Threaded 1.1/2 x 18tpi Various shanks available in our shop. Body Diameter 100mm Body Length 90mm Tool Hole Diameter 25mm Dial Reading 0.01mm. The item "Vertex Boring Head 100mm Metric Graduations 30 INT Shank M12" is in sale since Saturday, February 3, 2018. This item is in the category "Business, Office & Industrial\CNC, Metalworking & Manufacturing\Workholding & Toolholding\Toolholding\Adapters & Holders\Boring Head & Adapters". The seller is "fordeight" and is located in West Midlands. This item can be shipped worldwide.