All have 0.50 diameter bolt holes. All came from a Hwacheon CNC Lathe but will probably fit many other Manufacturers.
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The item "9 HWACHEON CNC Lathe Tool Holders, Boring Bar Face ID OD TTC-10 Hi-Eco Tech Mega" is in sale since Tuesday, April 12, 2016. This item is in the category "Business & Industrial\Manufacturing & Metalworking\Metalworking Tooling\Toolholding\Boring Tool Holders". The seller is "midwest_machinery_inc" and is located in Franksville, Wisconsin. This item can be shipped to United States.