Protect valuable tools, fishing gear and more against rust and corrosion with this unique, shield that lasts up to four months. Shaped like a shield, it emits Vapor Phase Corrosion Inhibitors (VpCl) that form an invisible layer that seals metals from air and moisture. It protects up to a two cubic foot area and includes a gauge that indicates when it needs to be replaced. Small enough to fit into a slot in a tackle box, this is cheap insurance against the cost of the gear it is designed to protect!