? American UN For CNC Machining Centers and Milling Machines ? Need to make a thread on a non-rotatable bulky part ? Higher machine speeds ? Multi-tooth type inserts ? Less downtime and tooling changes ? Cost saving tooling system less expensive than HSS Taps and Dies ? Less machine power required ? Better thread surface finish yields better sealing and engagement ? No undercut is necessary due to CNC control accuracy ? Carbide inserts for a wide variety of workpiece materials