End Mill Holders, Adapters & Accessories - MSCDirectDiscover Rotary Tool Holders & Accessories and other Tool Holding at MSC Industrial Supply. Over 1 million products that ship and deliver fast.end mills accessories,JET | Accessories for Milling - JET ToolsJET Milling Accessories include Clamping Kits, Cooling Systerms, Collet Racks and more! . 20 Piece Tin-Coated Double End Mill Set. 650210. More Details.