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Our Hex Threading Die 1/2 -20 HSS from Irwin is the perfect tool for professional metalworkers who need to restore external threads on a variety of materials, including steel and nonferrous metals. With its high-speed steel construction, this die stays sharper longer than carbon steel alternatives, ensuring precision and accuracy in every thread. The alignment plate improves the strength of the die and helps prevent cross-threading for consistent results every time. Whether you're working on aircraft repairs or general machining projects, the Hex Threading Die 1/2 -20 HSS from Irwin is a reliable tool that won't let you down.