Extrusion tools are used in plastic insulation and coating processes for electrical wires and cables, ensuring smooth and uniform coverings. Typically divided into inner and outer dies, the inner die can be made from materials such as diamond, tungsten carbide, or hardened steel. Weilly's diamond-core extrusion dies deliver superior wear resistance, precision, and durability, lasting much longer than conventional tungsten carbide dies—even under high-speed, continuous production conditions.