A micrometer lead screw provides 0.0001 direct reading accuracy and ease of adjusting. Packing including:1pcs 2" Boring Head, 1pcs R8 Shank, 9pcs 1/2" Carbide Boring Bar, 3pcs Allen Wrench. This item is in the category "Business & Industrial\CNC, Metalworking & Manufacturing\Workholding & Toolholding\Toolholding\Adapters & Holders\Boring Head & Adapters". The seller is "rafl-10" and is located in this country: US. This item can be shipped worldwide.