Sprue pins are small metal rods used in the manufacturing process of injection molding. They help to create channels for molten material to flow into a mold, ensuring that the final product is filled evenly. These pins are essential for producing high-quality parts, as they minimize defects and improve the overall efficiency of the molding process. In addition to their role in injection molding, sprue pins can also be found in other manufacturing techniques, such as die casting. They are typically made from durable materials to withstand high temperatures and pressures, making them a vital component in various industrial applications.