Have you given up on wearing earrings due to your reactions or rashes w/ different metals? These hooks are what you've been looking for! Created with Niobium which is a pure element (Element #41) and metal (as is platinum) and is completely allergen free. No nickel or any other metal alloys are used. 3x harder than Sterling and will never tarnish. Hooks can be anodized in silver or gold colors so you can start wearing many of your favorite earrings again! Buy some colored options for more fun and colorful earrings too.