This shell mill is in great shape. The tool bits are 3/4 or.750 in length in a triangle and are changeable to 3 different cutting tips... I'm not sure if that is compatible with CAT50 or NMTB50.. But maybe you know that. The item "Erickson Tool 5 inch shell face mill CV50 Holder 10 carbide bit inserts milling" is in sale since Monday, October 03, 2016. 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, PH, SG, to Switzerland, NO, SA, UA, AE, QA, KW, BH, HR, MY, CL, CO, CR, PA, TT, GT, HN, JM.