And the through hole is 2.50 inches.. It is 12 inches in diameter... Any questions, just message me... Glued and screwed for major strength.The item "NEW CUSHMAN 4 JAW INDEPENDENT 12 LATHE CHUCK factory cosmoline on it still" is in sale since Tuesday, February 07, 2017. This item is in the category "eBay Motors\Parts & Accessories\Wholesale Lots\Tools". The seller is "dragar85" and is located in Minneapolis, Minnesota. This item can be shipped to United States, to Canada, to United Kingdom, DK, RO, SK, BG, CZ, FI, HU, LV, LT, MT, EE, to Australia, GR, PT, CY, SI, to Japan, SE, to Taiwan, TH, to Belgium, to France, to Hong Kong, to Ireland, to Netherlands, PL, to Spain, to Italy, to Germany, to Austria, to New Zealand, SG, to Switzerland, NO, SA, UA, AE, QA, KW, BH, HR, MY, BR, CL, CO, CR, PA, TT, GT, HN, JM.