Built to protect and shield your tackle as well as organize and store it, the Tuff 'Tainer®, Zerust infused boxes, are the ideal way to keep and maintain any of your small household treasures. Zerust has proven to be the absolute best way to protect your tackle against rust and corrosion. Molded into the Tuff 'Tainer dividers themselves, the patented polymer emits a harmless vapor, forming a protective layer around your metal surfaces. Maintain their protection for up to five years, you can count on hassle free, long lasting storage with all of your Tuff 'Tainer utility boxes.