Raw material inspection
All alloy raw materials are checked upon arrival. We verify material composition and quality standards to eliminate unqualified materials before production starts.
Online testing
Real-time inspection runs throughout the machining and production process. Defective parts can be spotted and corrected promptly to reduce errors.
Finished product sampling inspection
Random sampling is conducted on completed goods. Workers examine appearance, size and workmanship to keep overall consistency stable.
Finished product performance testing
We carry out functional durability, opening-closing smoothness and weather resistance tests, ensuring the hardware works reliably for long-term use.