PCD Wire Drawing Die: 

The high wear-resistance of polycrystalline diamond dies gives high efficiency and less downtime, as you can draw more kilograms of wire before you need to re-cut the die. Because the wear on the die is even and predictable, you know exactly when the die needs to be re-cut, minimizing costly scrap and maximizing product quality.

These dies work best with nonferrous wire, including copper, aluminum, and stainless steel.