3-1/4(80mm) THRU HOLE DIAMETER. Of back screws parameter circle: 226mm.
Of back recess circle: 206mm. This item is in the category "Business & Industrial\CNC, Metalworking & Manufacturing\Workholding & Toolholding\Workholding\Chucks\Lathe Chuck Jaws". The seller is "niuniucme" and is located in this country: US. This item can be shipped worldwide.