... FinishingZn- Plated,Ni-plated,Passivated,Tin-plated,Sandblast and Anodize,Chromate, Polish,Electro Painting,Black Anodize,Plain, ... more than 8 years in this field) and strict QC and QA system Have passed the quality authenticationHigh efficiency hardware ... etc. Every rivet from Jinri has passed strict manufacturing and quality control process, which include mounting press, grinding & polishing, ...