collective metal coin holder keychain Size: Diam.25-55mm as your ... TechniqueDie-casting, engraved, painted, silk screen, imitation enamel, offset printing, etc.PlatingGold, silver, nickel, brass, copper, antique plating ... size is welcome.LogoSoft enamel, laser engraving, offset printing, screenprint etc. Customize logo.BackFlat, sand blasting or ... ! collective simulation design metal coin holder keychain