... .Style of Endshalf loop / full loopSurface FinishNickel / Zinc / Gold / Silver / Tin / Chromium / Yellow Zinc / Oxide black or CustomizableApplicationsAerospace, Industrial, Medical applications ... . We can do OEM5. Surface treatment : Zinc, Nickel, Silver, Golden, Tin, Powder, Coating.6. Applications: Automotive, medical device, electronics, toy ,etc.