PROTECTS METALS AGAINST TARNISH & CORROSION: Prevents against tarnish corrosion and oxidation on newly cleaned fine and fashion metal goods including Silver Gold Copper Bronze Tin Brass Magnesium Iron Weapon and Steel. Use to keep your jewelry watches silverware and coins shiny and bright. They protect utilizing advanced patented technology wont leave deposits are non-abrasive and are safe for all metals and gemstones even when in direct contact with the item you want to protect!