Metric Round Die,Product Details1.Features: Conical locking hole, strong locking and not loose. Perfect for re-threading existing threads in hard materials like metal and making new threads in soft material such as plastic. The surface is lubricated with grease to prevent rust, the thread is clear and easy to repair.2.Applications: Can process, correct or clean the external threads. Suitable for general purpose threading in stainless steel, aluminum alloy, cast iron, copper, iron, aluminum, plastic, etc.. Great for maintenance and repair work on pipes, boards and machinery.3.Round Die: Thread size: M20 x 1 (right hand); outside diameter (OD): 45mm / 1.8"; Thickness: 10mm / 0.39"; accuracy class: 6g; fine grinding. Made of alloy steel, hardness, high torque, good toughness and wear-resistance for long service life.4.