Made in USA Brand New 2-1/2" (Head Diameter) x 5/8" (Hole Diameter) x 7/8-20 Threaded Back Precision Boring Head. Listings are described with detail information.Powered by SixBit's eCommerce Solution. This item is in the category "Business & Industrial\CNC, Metalworking & Manufacturing\Workholding & Toolholding\Toolholding\Adapters & Holders\Boring Head & Adapters". The seller is "hpcecs-online" and is located in this country: US. This item can be shipped worldwide.