Rong Chang is dedicated to delivering solutions in metal hardware manufacturing. We focus on solving our clients' challenges across development, quality control, lead time, and cost management. Backed by years of experience in precision processing, along with in-house tooling capabilities and flexible mid-volume production. Our services include semi-production, heat treatment, surface treatment, and precision product assembly, ensuring consistency and quality throughout the entire process. Our products could achieve less than 50PPM. We also offer comprehensive documentation, including Hardness and Dimension Test Reports, Material Test Certificates, Lab Calibration Certificates, and Production Part Approval Process (PPAP) submissions to ensure transparency and compliance with our customers' requirements.