After more than 20 years of continuous development, Our company has established a professional fastener laboratory. Our testing equipment includes salt spray testing machines, video measuring instruments, Vickers hardness testers, Rockwell hardness testers, cutting machines, and metallographic grinding and polishing machines, automatic single-head inlay machine, etc. and We had obtained IATF16949:2016 system certification in 2022, We are always providing a strong guarantee for product quality control.