Modular End Milling DUO-LOCK THE ONLY MODULAR SYSTEM WITH THE PERFORMANCE OF A SOLID CARBIDE END MILL Materials P M K S H Explore DUO-LOCK Industries General Automotive Oil & Gas Engineering Aerospace Medical Wind & Solar Applications DUO-LOCK is a revolutionary coupling for solid carbide end milling applications. This replaceable head design combines a high accuracy in runout and length repeatability with maximum stability, making it a precise and virtually unbreakable interface. C85 kennametal.com