Hengjiu is a professional manufacturer specializing in motorcycle chains since its establishment. Because motorcycle chains must operate under demanding conditions—such as high loads, intense wear, and elevated temperatures—they require exceptional strength, fatigue resistance, high-precision transmission, and safety performance. To meet these requirements, we select high-grade alloy steel and implement strict quality control on all raw materials. Before storage, our quality department conducts thorough inspections, including appearance checks, dimensional measurements, metallographic analysis, as well as tests for corrosion resistance and surface hardness. These procedures ensure a stable and high-quality supply from the very source of the chain production.