Milwaukee 3/8-16 NC 1" Hex Threading Die is the tool for creating or repairing precise external threads. This threading die is precision machined and built to last, featuring long-lasting laser-etched sizing for clear markings and a protective Black Oxide coating that resists corrosion. Its 1" hex shape is compatible with the MILWAUKEE® Hex-LOK™ 2-in-1 Threading Handle, as well as all standard 1" hex die stocks. Engineered for durability, it is designed to cut threads in common metal applications such as brass, aluminum, and mild steel. For results, it is to use cutting fluid during operation. Model Number: 49-57-5348