Milwaukee 3/8"-18 NPT 2-1/6" Hex Threading Die is precision machined to create or repair clean, accurate external threads with ease. Featuring long-lasting laser-etched sizing for clear markings, this threading die is coated with a protective Black Oxide finish to resist corrosion and enhance durability. Its large 2-1/6” hex shape makes it compatible with 2-1/6” die stocks or suitable for use with wrenches, providing versatile handling options. Engineered for strength and reliability, it is i for cutting threads in common metals such as brass, aluminum, and mild steel. For optimal performance, it is to use this hex die with cutting fluid. Model Number: 49-57-5392