This is a used Boring Head in GREAT condition. Valenite CAT40 End Mill Holder included.Distance Between Hole Centers: 5/8. End Mill Holder Adapter Size: CAT40. Comes as shown in pictures. This item is in the category "Business & Industrial\CNC, Metalworking & Manufacturing\Workholding & Toolholding\Toolholding\Adapters & Holders\Boring Head & Adapters". The seller is "the_machinists_dream" and is located in this country: US. This item can be shipped worldwide.