HOUSWEETY 1PC Silver Tone Stainless Steel Split Rings Key Rings 33mm(1 2/8") Approx:33mm(1 2/8");Hole size: 25mm(1") Thickness: 3.2mm( 1/8") Main Color:dull silver tone(not silver plated); Main Material:Stainless steel(Cadmium Free); High quality stainless steel,no fading, nondeformable,allergy free; Environmental protection,beautiful appearance,light weight,convenient installation.Beware of swallowing by children. Perfect findings for a variety of jewelry making.Every findings has its unique design and style and theme, hence the jewelry made with them are unique and represent your own fashion.