The Hex Drive Selector Assembly for FMC John Bean Brake Lathe 90686 is an essential part that greatly enhances the functionality of this specific brake lathe model. Its unique design allows for precise and efficient selection of tools and dies, ensuring optimal cutting performance and tool life. The assembly uses high-quality hex drive shafts to engage the tool holder, which reduces stress on the tool and the lathe motor. This setup also minimizes chatter and ensures a smooth and quiet cutting process. Additionally, the assembly's compact design allows for easy storage and transportation, making it an ideal solution for small shops and workshops. With its numerous benefits and compatibility with the 90686 brake lathe, the Hex Drive Selector Assembly is a wise investment for any user looking to improve their cutting capabilities and productivity.