Nano-Diamond America Nano-Dies ® Nano-Diamond America Nano-Dies ® Cable Manufacturer? Nano-Dies are built especially for you. POWER CABLES Nano-Dies were used for this cable. PCD Dies were used for this cable. Big Diamond Dies that Work Better and Cost Less WIRE AND TUBE APPLICATIONS LEARN MORE A Nano-Die has a pure nanocrystalline diamond surface on top of an inexpensive tungsten-carbide nib. The diamond layer is grown in the process of making the die. The only place you need diamond is at the working surface.