Wire rod is a raw material for processing, supplied in a coiled state after being drawn into a long, thin metal strand. There is a wide variety of materials, including carbon steel, alloy steel, stainless steel, copper, and aluminum. While the cross-section is typically circular, irregular cross-sections also exist. Its properties, such as strength, electrical conductivity, and corrosion resistance, are carefully selected according to the application. Primary uses include screws, bolts, springs, wire ropes, welding rods, and electronic components. Typical processing methods include drawing for thinning, cold heading for forming complex-shaped parts, cutting, bending, heat treatment, and surface treatment. It is a fundamental material indispensable for manufacturing high-precision components.