Uxcell M20 X 2.5 Left Hand Threading Die | Alloy Steel Round Die For External Thread Cutting | Metric Size 20mm X 2.5mm Pitch

If you work with metal or need to repair threads, this uxcell threading die is exactly what you've been looking for. It's a M20 x 2.5 left-hand metric die, meaning it cuts threads that tighten counterclockwise - perfect for specific applications where regular right-hand threads wouldn't work. The 45mm diameter and 18mm thickness give you plenty to grip onto with a standard die wrench. Made from tough alloy steel, this thing can handle cutting threads in stainless steel, aluminum, cast iron, copper, and even plastics without wearing out quickly. The fine grinding on the cutting edges means you get clean, precise threads every time. There's even a conical locking hole that keeps it secure in your wrench so it doesn't slip during use. Here's a pro tip: always use some cutting fluid or oil when you're working with metals - it makes the cutting smoother and helps the die last longer. For steel, use cutting oil or engine oil; cast iron works best with dry oil; aluminum likes kerosene; and for stainless steel, try a mix of kerosene and lard oil. When you're ready to use it, make sure your die wrench matches the size and tighten those set screws good. Chamfer the end of your rod about 1mm at a 45-degree angle first - this helps the die start cutting cleanly. As you're turning, remember to reverse every quarter to half turn to break off the chips and clear them from the holes. This prevents jamming and gives you much cleaner threads. The bar you're threading should be slightly smaller than the final thread diameter - about 0.05mm to 0.15mm smaller works best. If it's too big, you'll struggle to cut and might damage the die teeth. This isn't just for making new threads either - it's great for cleaning up damaged existing threads or doing maintenance work on machinery. The surface comes with a light grease coating to prevent rust, so it's ready to use right out of the package. Whether you're a professional mechanic, DIY enthusiast, or work in maintenance, having a quality threading die like this in your toolbox saves so much time and frustration. It's one of those tools you might not need every day, but when you do need it, nothing else will do the job properly.