Engineered for the most demanding mold and die applications, our HEX series is the ultimate end mill for hardened steels. These tools feature a unique bronze-colored Balzers DR3 coating that resists temperatures up to 1300°C. This makes them the premier end mills for cutting hardened steel in high-heat environments. Whether you need standard end mills for hardened steel or specialized... https://www.dohrecnc.com/product/hex-ball-nose-end-mills.html