Flambeau's Zerust corrosion protection has proven to be the absolute best way to protect your tools against rust and corrosion. Molded directly into many Flambeau tool and storage boxes, this patented polymer emits an odorless harmless vapor, forming a protective layer around metal surfaces. Most Zerust products maintain their effectiveness for five years of hassle free, long lasting protection. Flambeau Hardware - Contractor Grade quality at DIY prices!