... 4. Strict quality control, as we complete the process from open mould to assembly in our own factory.5. Main customers: HAFELE, Carlisle ... , analyse and mate results of testing.Our factory:Ningbo Yinzhou Qiuai Hongkun Metalwork Factory was established in 1992. It is a ... , hinges, door stops, flush bolts and stamping parts.The factory adheres to the philosophy of quality first , makes great efforts ...