The Apollo brand runner cutters are high-performance milling tools designed for mold and die work. They feature a solid carbide construction with TiAlN coating for wear resistance and heat dissipation. The cutters have a ball nose design for smooth surface finishes and are available in multiple diameters from 1/8" to 1/2". These specialty cutters are made in the USA and optimized for machining hardened steels from 48-68 HRC. With their durable construction and specialized geometry, the Apollo runner cutters excel at semi-finishing and finishing passes in mold and die applications.