1,precision stamping metal parts with grinded surface 2,customized sureface treatment 3,High QC ... holes deburred,surfaces free of scratches.4. Most advanced test equipments to ensure the QUALITY. DimensionAccording to customer's ... bearing seat, spring, connector, socket, bushing, push-button, etc.Surface Finishannealing, natural anodization, heat treatment, polishing, nickel plating, chrome plating ...